Treat a code as a reversible rule
In coding–decoding, the surface text is transformed by a rule. The rule may shift letters, reverse order, rearrange positions, replace letters by digits, or map whole words to invented tokens. Start by comparing the same positions in a worked input and output. If length stays the same, test a one-to-one letter mapping. If letters appear in reverse order, consider reversal before shifts. If digits appear, check whether they represent alphabet positions or an arbitrary substitution table.
Use two examples to resolve ambiguity
If MATH becomes PDWK, each letter moves forward three places. Therefore CODE becomes FRGH, applying +3 to C, O, D and E individually. A single example can also hide a reversal-plus-shift rule; a second pair tests it. For digit codes, repeated letters must receive consistent digits within a simple substitution code. If two known words share letters, align the overlap to identify the common code symbols. Do not assume the code for a word equals the sum of its letters unless the example supports that rule.
Artificial-language sentences
When whole sentences are translated word for word, compare sentences with shared words. The code token common to two coded sentences should correspond to the English word common to those sentences, provided the correspondence is one-to-one. Eliminate identified tokens from each sentence, then solve remaining matches. A table with English words on one side and code tokens on the other prevents guesswork. Word order may change, so intersection of the sets is more reliable than position.
Verification and traps
Apply the full proposed rule to every provided example. Pay attention to wraparound near Z, repeated letters, and whether a reverse operation comes before or after a shift. In a coded-language item, if two English words are common between sentences, one comparison cannot identify which token belongs to which; use another sentence. Mark unresolved mappings as a set rather than pretending certainty. In review, distinguish the discovery step from the application step; many errors come from finding the right rule but applying it unevenly.
Practice — 50 questions
Attempt every item before reading the answers below. Figure questions require the printed or on-screen diagram.
1. In a certain code language, "SUGAR" is written as "ZBNHY". How will "BREAD" be written in that language?
A. IYKHL B. IYLHK C. IHLYK D. IYLKH
2. In a certain code language, ‘FLAG’ is coded as ‘25’ and ‘BIRD’ is coded as ‘32’. How will ‘GOLD’ be coded in the same language?
A. 80 B. 32 C. 37 D. 54
3. In a certain code language, ‘FIRM’ is coded as ‘8395’ and ‘TRIM’ is coded as ‘3584’. What is the code for ‘T’ in that language?
A. 4 B. 8 C. 3 D. 5
4. In a certain code language, ‘RAIN’ is coded as ‘41’ and ‘CUP’ is coded as ‘39’. How will ‘DESK’ be coded in the same language?
A. 36 B. 38 C. 39 D. 35
5. In a certain code language, "STONE" is written as "YZUTK". How will "RIVER" be written in that language?
A. KOBXX B. XBOKX C. BOXKX D. XOBKX
6. If in a code language "WATER" is written as "PXRTJ", what is the code for "TABLE" in the same language?
A. RXIVT B. RIXVT C. VXIRT D. RXVIT
7. In a certain code language, ‘FLAP’ is coded as ‘2796’ and ‘CLAP’ is coded as ‘3269’. What is the code for ‘C’ in that language?
A. 9 B. 2 C. 3 D. 6
8. In a certain code language, ‘CAST’ is coded as ‘5648’ and ‘SLAT’ is coded as ‘3485’. What is the code for ‘L’ in that language?
A. 5 B. 4 C. 3 D. 8
9. In a certain code language, ‘COOL’ is coded as ‘135’ and ‘ROAD’ is coded as ‘114’. How will ‘CHAIR’ be coded in the same language?
A. 96 B. 38 C. 117 D. 78
10. In a certain code language, ‘STALE’ is coded as ‘74982’ and ‘SKATE’ is coded as ‘46892’. What is the code for ‘L’ in that language?
A. 8 B. 9 C. 2 D. 7
11. Study the coded sentences and answer the question. Sentence 1: "SUN BAT MUD" is coded as "2z 6p 4x". Sentence 2: "SUN OWL SKY" is coded as "1v 2z 0w". Sentence 3: "BAT OWL HEN" is coded as "8n 6p 0w". What is the code for "BAT"?
A. 8n B. 1v C. 6p D. 2z
12. If in a code language "BRIDGE" is written as "HOVUAS", what is the code for "SILVER" in the same language?
A. DVYXSO B. YODXSV C. YVDXSO D. YVOXSD
13. If each letter of the word "PENCIL" is coded as (2 × alphabet position) − 1, what is the code for "PENCIL"?
A. 31-9-27-5-17-23 B. 31-10-27-5-17-23 C. 32-9-27-5-17-23 D. 31-9-27-5-15-23
14. If in a code language "ISLAND" is written as "VHAGCM", what is the code for "FLOWER" in the same language?
A. EAQPLI B. EALQPI C. EAPQLI D. EIPQLA
15. In a certain code language, "SUMMER" is written as "ACUUMZ". How will "PENCIL" be written in that language?
A. XMQKVT B. XQVKMT C. XVMKQT D. XMVKQT
16. Study the coded sentences and answer the question. Sentence 1: "DOG SKY RAY" is coded as "4x 7q 2z". Sentence 2: "DOG ELM ICE" is coded as "6p 9m 4x". Sentence 3: "SKY ELM BEE" is coded as "5t 7q 9m". What is the code for "DOG"?
A. 2z B. 9m C. 6p D. 4x
17. In a certain code language, ‘DUNK’ is coded as ‘3529’, ‘RUNG’ is coded as ‘7493’ and ‘RING’ is coded as ‘7438’. What is the code for ‘I’ in that language?
A. 7 B. 4 C. 8 D. 3
18. Study the coded sentences and answer the question. Sentence 1: "OWL PIG ELF" is coded as "0w 8n 5t". Sentence 2: "OWL MUD COW" is coded as "7q 6p 5t". Sentence 3: "PIG MUD DOG" is coded as "6p 8n 1v". What is the code for "OWL"?
A. 5t B. 1v C. 8n D. 0w
19. In a certain code language, ‘STEAK’ is coded as ‘38617’ and ‘STALE’ is coded as ‘61583’. What is the code for ‘L’ in that language?
A. 3 B. 5 C. 1 D. 6
20. Study the coded sentences and answer the question. Sentence 1: "FIR BEE MUD" is coded as "7q 0w 8n". Sentence 2: "FIR PIG SEA" is coded as "8n 5t 3k". Sentence 3: "BEE PIG FOG" is coded as "9m 3k 7q". What is the code for "PIG"?
A. 7q B. 8n C. 9m D. 3k
21. If each letter of the word "BRIDGE" is coded as the letter’s position counted from the end (Z=1, Y=2 …), what is the code for "BRIDGE"?
A. 23-9-18-23-20-22 B. 25-9-18-23-20-20 C. 25-9-18-23-20-22 D. 25-9-18-23-19-22
22. In a certain code language, ‘DOG’ is coded as ‘35’ and ‘TREE’ is coded as ‘64’. How will ‘MAN’ be coded in the same language?
A. 37 B. 84 C. 59 D. 56
23. In a certain code language, ‘DESERT’ is written as ‘DSRTEE’ and ‘SADDLE’ is written as ‘SDDLAE’. How will ‘CULTURE’ be written in that language?
A. ERUTLUC B. CLTRUUE C. TURECUL D. UUECLTR
24. In a certain code language, ‘PEAT’ is coded as ‘1328’, ‘EAST’ is coded as ‘8342’ and ‘LINT’ is coded as ‘6527’. What is the code for ‘S’ in that language?
A. 2 B. 3 C. 4 D. 8
25. In a certain code language, ‘CLAM’ is coded as ‘9675’, ‘LEAD’ is coded as ‘3175’ and ‘MALT’ is coded as ‘2957’. What is the code for ‘C’ in that language?
A. 5 B. 7 C. 9 D. 6
26. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "BIRD WARM SKY" = "rub run zab". Sentence 2: "GRAY WARM LEAF" = "fem run zod". Sentence 3: "BIRD STAR GRAY" = "rub pet fem". What does the artificial-language word "fem" mean in English?
A. WARM B. GRAY C. BIRD D. STAR
27. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "WALK GOLD WOLF" = "zal bog rag". Sentence 2: "GOLD WARM SUN" = "bog lit zin". Sentence 3: "SUN WALK WIND" = "zin zal zon". What does the artificial-language word "zin" mean in English?
A. WARM B. WIND C. SUN D. WOLF
28. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "FISH WOLF FIRE" = "lur gug bas". Sentence 2: "STAR FIRE DUCK" = "nog bas fob". Sentence 3: "WOLF CROW STAR" = "gug vob nog". What does the artificial-language word "nog" mean in English?
A. WOLF B. FISH C. STAR D. CROW
29. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "SIT SNOW STAR" = "gel kan fib". Sentence 2: "STAR LOUD EAT" = "fib tuz mum". Sentence 3: "SNOW MOON EAT" = "kan dug mum". What is the artificial-language word for "STAR"?
A. fib B. gel C. tuz D. mum
30. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "MOON GOLD JUMP" = "pur pog bep". Sentence 2: "GOAT SKY GOLD" = "gun zan pog". Sentence 3: "GOAT MOON WOLF" = "gun pur fim". What does the artificial-language word "gun" mean in English?
A. GOLD B. GOAT C. JUMP D. SKY
31. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "LEAF MOON SING" = "bir pen kib". Sentence 2: "SKY SING FAST" = "tun kib zen". Sentence 3: "MOON FAST PINK" = "pen zen fim". What does the artificial-language word "zen" mean in English?
A. SKY B. FAST C. PINK D. MOON
32. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "SEA LOUD HIGH" = "fuf dar foz". Sentence 2: "HIGH BLUE WALK" = "foz bep fob". Sentence 3: "SEA SWIM WALK" = "fuf dut fob". What does the artificial-language word "foz" mean in English?
A. LOUD B. HIGH C. WALK D. BLUE
33. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "GOLD GRAY TREE" = "pib pol fez". Sentence 2: "GRAY WALK BLUE" = "pol duv kok". Sentence 3: "DEER TREE BLUE" = "nob fez kok". What is the artificial-language word for "GRAY"?
A. duv B. pol C. pib D. kok
34. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "LEAF SNOW SWIM" = "fik bub zuz". Sentence 2: "SLOW SNOW COLD" = "puf bub veb". Sentence 3: "DUCK SLOW LEAF" = "niz puf fik". What is the artificial-language word for "DUCK"?
A. veb B. fik C. niz D. zuz
35. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "MOON DUCK GOAT" = "bag vug kum". Sentence 2: "LOUD MOON SWIM" = "sum bag gat". Sentence 3: "DUCK SWIM GRAY" = "vug gat pup". What is the artificial-language word for "LOUD"?
A. vug B. sum C. pup D. bag
36. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "FISH JUMP EAT" = "keb kas vag". Sentence 2: "RED FISH PINK" = "tov keb mig". Sentence 3: "PINK DUCK EAT" = "mig per vag". What does the artificial-language word "tov" mean in English?
A. JUMP B. RED C. PINK D. DUCK
37. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "BIRD LION FAST" = "pin dod nif". Sentence 2: "BIRD SLOW LOUD" = "pin rap kug". Sentence 3: "WALK LION SLOW" = "kuf dod rap". What does the artificial-language word "kuf" mean in English?
A. FAST B. WALK C. LOUD D. SLOW
38. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "BIG LOUD RED" = "tot pol gup". Sentence 2: "BIG SING SLOW" = "tot tip vup". Sentence 3: "LOUD WOLF SING" = "pol sev tip". What does the artificial-language word "sev" mean in English?
A. WOLF B. BIG C. LOUD D. SING
39. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "LEAF SUN PINK" = "sas koz log". Sentence 2: "COLD LEAF SNOW" = "lak sas zis". Sentence 3: "EAT PINK SNOW" = "ked log zis". What does the artificial-language word "lak" mean in English?
A. SUN B. COLD C. SNOW D. PINK
40. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "FIRE RAIN BLUE" = "tez pap kum". Sentence 2: "FISH SING BLUE" = "nep log kum". Sentence 3: "FISH GRAY FIRE" = "nep dil tez". What does the artificial-language word "log" mean in English?
A. FISH B. BLUE C. GRAY D. SING
41. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "SEA LION TREE" = "liv lez fab". Sentence 2: "LION LOUD WALK" = "lez rir zes". Sentence 3: "JUMP WALK SEA" = "bob zes liv". What does the artificial-language word "rir" mean in English?
A. JUMP B. LOUD C. SEA D. TREE
42. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "RED SUN HIGH" = "tok dop sid". Sentence 2: "TREE TALL SUN" = "vor ped dop". Sentence 3: "RED LEAF TALL" = "tok dad ped". What is the artificial-language word for "LEAF"?
A. dop B. dad C. tok D. ped
43. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "STAR HIGH BIRD" = "sov mad nob". Sentence 2: "DUCK SLOW HIGH" = "fot nuk mad". Sentence 3: "BIRD MOON SLOW" = "nob zos nuk". What is the artificial-language word for "STAR"?
A. fot B. sov C. nuk D. mad
44. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "GRAY LOUD WOLF" = "man vuk mil". Sentence 2: "GRAY LION SUN" = "man kin nog". Sentence 3: "LOUD HIGH SUN" = "vuk bam nog". What does the artificial-language word "mil" mean in English?
A. SUN B. HIGH C. LOUD D. WOLF
45. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "SKY TREE SEA" = "tis goz rad". Sentence 2: "BLUE TREE BEAR" = "kaz goz lub". Sentence 3: "SEA TALL BLUE" = "rad ses kaz". What does the artificial-language word "lub" mean in English?
A. SEA B. TALL C. BEAR D. BLUE
46. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "RAIN SNOW CROW" = "met vet bib". Sentence 2: "SNOW SEA MOON" = "vet mep seg". Sentence 3: "WOLF SEA RAIN" = "pib mep met". What is the artificial-language word for "CROW"?
A. pib B. mep C. bib D. seg
47. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "RUN DEER BLUE" = "gog put fib". Sentence 2: "BLUE COLD TALL" = "fib vup sig". Sentence 3: "TALL DUCK PINK" = "sig doz pum". Sentence 4: "PINK BIG DEER" = "pum nut put". What is the artificial-language word for "BLUE"?
A. sig B. fib C. nut D. vup
48. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "TALL EAT GOAT" = "pug leb pal". Sentence 2: "PINK EAT SIT" = "put leb gal". Sentence 3: "SIT BLUE SLOW" = "gal dak dev". Sentence 4: "SNOW GOAT SLOW" = "dib pal dev". What is the artificial-language word for "EAT"?
A. pal B. dib C. leb D. put
49. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "HIGH BIRD MOON" = "las duk mez". Sentence 2: "WALK SING HIGH" = "fak dus las". Sentence 3: "COLD RED WALK" = "nig zog fak". Sentence 4: "COLD BIRD WARM" = "nig duk ton". What does the artificial-language word "zog" mean in English?
A. WARM B. COLD C. RED D. SING
50. In a certain artificial language, English sentences are translated word-for-word as follows. Sentence 1: "LOUD SKY GOLD" = "bur tub sud". Sentence 2: "RUN RED LOUD" = "pud nit bur". Sentence 3: "FAST WALK RUN" = "nug tut pud". Sentence 4: "SKY WALK BIRD" = "tub tut par". What is the artificial-language word for "WALK"?
A. tut B. par C. sud D. bur
Answers and explanations
After checking the key, explain the rule or diagram transformation to yourself before moving on.
1. B. Each letter is shifted forward by 7 place(s) in the alphabet (SUGAR → ZBNHY). Applying the same shift: BREAD → IYLHK.
APRS26-05-01 | Letter shift | Easy
2. C. Rule: code = sum of the alphabet positions − 1. Check: FLAG (F=6, L=12, A=1, G=7) → 25; BIRD (B=2, I=9, R=18, D=4) → 32. So GOLD (G=7, O=15, L=12, D=4) → 37.
APRS26-05-02 | Word-sum numeric code | Easy
3. A. Each letter has a fixed digit, so letters common to two words share the digits common to their codes. In TRIM: R, I, M (also in FIRM) must take the digit(s) common to both codes: 3, 5, 8. That accounts for 3 of the 4 digits of TRIM's code, leaving 4 for the only remaining letter, T. So the code for T is 4.
APRS26-05-03 | Letter-digit code (intersection) | Easy
4. B. Rule: code = sum of the alphabet positions − 1. Check: RAIN (R=18, A=1, I=9, N=14) → 41; CUP (C=3, U=21, P=16) → 39. So DESK (D=4, E=5, S=19, K=11) → 38.
APRS26-05-04 | Word-sum numeric code | Easy
5. D. Each letter is shifted forward by 6 place(s) in the alphabet (STONE → YZUTK). Applying the same shift: RIVER → XOBKX.
APRS26-05-05 | Letter shift | Easy
6. A. Each letter of the word is replaced by a fixed substitute letter (a one-to-one letter map, derived from WATER → PXRTJ). Applying the same map to TABLE gives RXIVT.
APRS26-05-06 | Letter substitution | Easy
7. C. Each letter has a fixed digit, so letters common to two words share the digits common to their codes. In CLAP: L, A, P (also in FLAP) must take the digit(s) common to both codes: 2, 6, 9. That accounts for 3 of the 4 digits of CLAP's code, leaving 3 for the only remaining letter, C. So the code for C is 3.
APRS26-05-07 | Letter-digit code (intersection) | Easy
8. C. Each letter has a fixed digit, so letters common to two words share the digits common to their codes. In SLAT: S, A, T (also in CAST) must take the digit(s) common to both codes: 4, 8, 5. That accounts for 3 of the 4 digits of SLAT's code, leaving 3 for the only remaining letter, L. So the code for L is 3.
APRS26-05-08 | Letter-digit code (intersection) | Easy
9. C. Rule: code = 3 × (sum of the alphabet positions). Check: COOL (C=3, O=15, O=15, L=12) → 135; ROAD (R=18, O=15, A=1, D=4) → 114. So CHAIR (C=3, H=8, A=1, I=9, R=18) → 117.
APRS26-05-09 | Word-sum numeric code | Medium
10. D. Each letter has a fixed digit, so letters common to two words share the digits common to their codes. In STALE: S, T, A, E (also in SKATE) must take the digit(s) common to both codes: 4, 9, 8, 2. That accounts for 4 of the 5 digits of STALE's code, leaving 7 for the only remaining letter, L. So the code for L is 7.
APRS26-05-10 | Letter-digit code (intersection) | Medium
11. C. "BAT" is the word shared between Sentence 1 and Sentence 3 — the code common to both is "6p".
APRS26-05-11 | New-pattern (word-symbol) coding | Medium
12. C. Each letter of the word is replaced by a fixed substitute letter (a one-to-one letter map, derived from BRIDGE → HOVUAS). Applying the same map to SILVER gives YVDXSO.
APRS26-05-12 | Letter substitution | Medium
13. A. Coding rule: each letter's code = (2 × alphabet position) − 1. For "PENCIL": P=31, E=9, N=27, C=5, I=17, L=23 → 31-9-27-5-17-23.
APRS26-05-13 | Number coding | Medium
14. C. Each letter of the word is replaced by a fixed substitute letter (a one-to-one letter map, derived from ISLAND → VHAGCM). Applying the same map to FLOWER gives EAPQLI.
APRS26-05-14 | Letter substitution | Medium
15. D. Each letter is shifted forward by 8 place(s) in the alphabet (SUMMER → ACUUMZ). Applying the same shift: PENCIL → XMVKQT.
APRS26-05-15 | Letter shift | Medium
16. D. "DOG" is the word shared between Sentence 1 and Sentence 2 — the code common to both is "4x".
APRS26-05-16 | New-pattern (word-symbol) coding | Medium
17. C. Each letter has a fixed digit, so letters common to two words share the digits common to their codes. In RING: N (also in DUNK) must take the digit(s) common to both codes: 3; R, N, G (also in RUNG) must take the digit(s) common to both codes: 7, 4, 3. That accounts for 3 of the 4 digits of RING's code, leaving 8 for the only remaining letter, I. So the code for I is 8.
APRS26-05-17 | Letter-digit code (intersection) | Medium
18. A. "OWL" is the word shared between Sentence 1 and Sentence 2 — the code common to both is "5t".
APRS26-05-18 | New-pattern (word-symbol) coding | Medium
19. B. Each letter has a fixed digit, so letters common to two words share the digits common to their codes. In STALE: S, T, A, E (also in STEAK) must take the digit(s) common to both codes: 6, 1, 8, 3. That accounts for 4 of the 5 digits of STALE's code, leaving 5 for the only remaining letter, L. So the code for L is 5.
APRS26-05-19 | Letter-digit code (intersection) | Medium
20. D. "PIG" is the word shared between Sentence 2 and Sentence 3 — the code common to both is "3k".
APRS26-05-20 | New-pattern (word-symbol) coding | Medium
21. C. Coding rule: each letter's code = the letter’s position counted from the end (Z=1, Y=2 …). For "BRIDGE": B=25, R=9, I=18, D=23, G=20, E=22 → 25-9-18-23-20-22.
APRS26-05-21 | Number coding | Medium
22. A. Rule: code = (number of letters)² + sum of the alphabet positions. Check: DOG (D=4, O=15, G=7) → 35; TREE (T=20, R=18, E=5, E=5) → 64. So MAN (M=13, A=1, N=14) → 37.
APRS26-05-22 | Word-sum numeric code | Difficult
23. B. Rule: the consonants are written first (in their original order) followed by the vowels (in their original order) (DESERT → DSRTEE, SADDLE → SDDLAE). Applying it to CULTURE gives CLTRUUE.
APRS26-05-23 | Rearrangement coding | Difficult
24. C. Each letter has a fixed digit, so letters common to two words share the digits common to their codes. In EAST: E, A, T (also in PEAT) must take the digit(s) common to both codes: 8, 3, 2; T (also in LINT) must take the digit(s) common to both codes: 2. That accounts for 3 of the 4 digits of EAST's code, leaving 4 for the only remaining letter, S. So the code for S is 4.
APRS26-05-24 | Letter-digit code (intersection) | Difficult
25. D. Each letter has a fixed digit, so letters common to two words share the digits common to their codes. In CLAM: L, A (also in LEAD) must take the digit(s) common to both codes: 7, 5; L, A, M (also in MALT) must take the digit(s) common to both codes: 9, 7, 5. That accounts for 3 of the 4 digits of CLAM's code, leaving 6 for the only remaining letter, C. So the code for C is 6.
APRS26-05-25 | Letter-digit code (intersection) | Difficult
26. B. "GRAY" appears in both Sentence 2 and Sentence 3 — the artificial word common to both sentences' translations, "fem", must be "GRAY".
APRS26-05-26 | Shared word (intersection, reverse) | Easy
27. C. "SUN" appears in both Sentence 2 and Sentence 3 — the artificial word common to both sentences' translations, "zin", must be "SUN".
APRS26-05-27 | Shared word (intersection, reverse) | Easy
28. C. "STAR" appears in both Sentence 2 and Sentence 3 — the artificial word common to both sentences' translations, "nog", must be "STAR".
APRS26-05-28 | Shared word (intersection, reverse) | Easy
29. A. "STAR" appears in both Sentence 1 and Sentence 2 — the artificial word common to both sentences' translations, "fib", must be "STAR".
APRS26-05-29 | Shared word (intersection) | Easy
30. B. "GOAT" appears in both Sentence 2 and Sentence 3 — the artificial word common to both sentences' translations, "gun", must be "GOAT".
APRS26-05-30 | Shared word (intersection, reverse) | Easy
31. B. "FAST" appears in both Sentence 2 and Sentence 3 — the artificial word common to both sentences' translations, "zen", must be "FAST".
APRS26-05-31 | Shared word (intersection, reverse) | Easy
32. B. "HIGH" appears in both Sentence 1 and Sentence 2 — the artificial word common to both sentences' translations, "foz", must be "HIGH".
APRS26-05-32 | Shared word (intersection, reverse) | Easy
33. B. "GRAY" appears in both Sentence 1 and Sentence 2 — the artificial word common to both sentences' translations, "pol", must be "GRAY".
APRS26-05-33 | Shared word (intersection) | Easy
34. C. "DUCK" appears only in Sentence 3. Its sentence-mates "LEAF" and "SLOW" are shared words already pinned down from their own intersections with neighbouring sentences, so the one remaining artificial word in Sentence 3, "niz", must belong to "DUCK".
APRS26-05-34 | Unique word (elimination) | Medium
35. B. "LOUD" appears only in Sentence 2. Its sentence-mates "SWIM" and "MOON" are shared words already pinned down from their own intersections with neighbouring sentences, so the one remaining artificial word in Sentence 2, "sum", must belong to "LOUD".
APRS26-05-35 | Unique word (elimination) | Medium
36. B. "RED" appears only in Sentence 2. Its sentence-mates "PINK" and "FISH" are shared words already pinned down from their own intersections with neighbouring sentences, so the one remaining artificial word in Sentence 2, "tov", must belong to "RED".
APRS26-05-36 | Unique word (elimination, reverse) | Medium
37. B. "WALK" appears only in Sentence 3. Its sentence-mates "LION" and "SLOW" are shared words already pinned down from their own intersections with neighbouring sentences, so the one remaining artificial word in Sentence 3, "kuf", must belong to "WALK".
APRS26-05-37 | Unique word (elimination, reverse) | Medium
38. A. "WOLF" appears only in Sentence 3. Its sentence-mates "LOUD" and "SING" are shared words already pinned down from their own intersections with neighbouring sentences, so the one remaining artificial word in Sentence 3, "sev", must belong to "WOLF".
APRS26-05-38 | Unique word (elimination, reverse) | Medium
39. B. "COLD" appears only in Sentence 2. Its sentence-mates "SNOW" and "LEAF" are shared words already pinned down from their own intersections with neighbouring sentences, so the one remaining artificial word in Sentence 2, "lak", must belong to "COLD".
APRS26-05-39 | Unique word (elimination, reverse) | Medium
40. D. "SING" appears only in Sentence 2. Its sentence-mates "FISH" and "BLUE" are shared words already pinned down from their own intersections with neighbouring sentences, so the one remaining artificial word in Sentence 2, "log", must belong to "SING".
APRS26-05-40 | Unique word (elimination, reverse) | Medium
41. B. "LOUD" appears only in Sentence 2. Its sentence-mates "WALK" and "LION" are shared words already pinned down from their own intersections with neighbouring sentences, so the one remaining artificial word in Sentence 2, "rir", must belong to "LOUD".
APRS26-05-41 | Unique word (elimination, reverse) | Medium
42. B. "LEAF" appears only in Sentence 3. Its sentence-mates "RED" and "TALL" are shared words already pinned down from their own intersections with neighbouring sentences, so the one remaining artificial word in Sentence 3, "dad", must belong to "LEAF".
APRS26-05-42 | Unique word (elimination) | Medium
43. B. "STAR" appears only in Sentence 1. Its sentence-mates "HIGH" and "BIRD" are shared words already pinned down from their own intersections with neighbouring sentences, so the one remaining artificial word in Sentence 1, "sov", must belong to "STAR".
APRS26-05-43 | Unique word (elimination) | Medium
44. D. "WOLF" appears only in Sentence 1. Its sentence-mates "GRAY" and "LOUD" are shared words already pinned down from their own intersections with neighbouring sentences, so the one remaining artificial word in Sentence 1, "mil", must belong to "WOLF".
APRS26-05-44 | Unique word (elimination, reverse) | Medium
45. C. "BEAR" appears only in Sentence 2. Its sentence-mates "BLUE" and "TREE" are shared words already pinned down from their own intersections with neighbouring sentences, so the one remaining artificial word in Sentence 2, "lub", must belong to "BEAR".
APRS26-05-45 | Unique word (elimination, reverse) | Medium
46. C. "CROW" appears only in Sentence 1. Its sentence-mates "SNOW" and "RAIN" are shared words already pinned down from their own intersections with neighbouring sentences, so the one remaining artificial word in Sentence 1, "bib", must belong to "CROW".
APRS26-05-46 | Unique word (elimination) | Medium
47. B. "BLUE" appears in both Sentence 1 and Sentence 2 — the artificial word common to both sentences' translations, "fib", must be "BLUE".
APRS26-05-47 | Shared word (intersection) | Difficult
48. C. "EAT" appears in both Sentence 1 and Sentence 2 — the artificial word common to both sentences' translations, "leb", must be "EAT".
APRS26-05-48 | Shared word (intersection) | Difficult
49. C. "RED" appears only in Sentence 3. Its sentence-mates "COLD" and "WALK" are shared words already pinned down from their own intersections with neighbouring sentences, so the one remaining artificial word in Sentence 3, "zog", must belong to "RED".
APRS26-05-49 | Unique word (elimination, reverse) | Difficult
50. A. "WALK" appears in both Sentence 3 and Sentence 4 — the artificial word common to both sentences' translations, "tut", must be "WALK".
APRS26-05-50 | Shared word (intersection) | Difficult