Mock Test 14 — Delhi Police Constable Full Pattern (100 MCQs)

This is a full-length practice test following the exact Delhi Police Constable written exam pattern: 25 Reasoning, 50 General Knowledge & Current Affairs, 15 Numerical Ability, and 10 Computer Knowledge questions.

Section A: Reasoning (Q1–25)

1. In the analogy "Pilot is to Aircraft as Captain is to ___," the missing word is:
   (a) Ship (b) Sea (c) Anchor (d) Port
2. Find the missing number in the series: 7, 21, 63, 189, ?
   (a) 567 (b) 560 (c) 574 (d) 553
3. Which one does not belong with the others: Spinach, Carrot, Potato, Apple?
   (a) Apple (b) Spinach (c) Carrot (d) Potato
4. In a code, MANGO is coded as NBOHP (each letter shifted one place forward). How is CHERRY coded using the same rule?
   (a) DIFSSZ (b) DIFSSY (c) CIFSSZ (d) DIFTSZ
5. A man walks 33 km east, then 56 km north. How far is he from his starting point?
   (a) 65 km (b) 70 km (c) 75 km (d) 60 km
6. T is U's father. V is T's father. How is V related to U?
   (a) Grandfather (b) Father (c) Uncle (d) Brother
7. In the letter series M, P, T, Y, ?, what is the next letter (gaps +3, +4, +5, next +6)?
   (a) AE (b) AD (c) AC (d) AB
8. Given: A ≥ B > C ≥ D. Which of the following must be true?
   (a) A ≥ D (b) D > A (c) B < D (d) C > A
9. In a class of 95 students, Tanvi ranks 42nd from the top. What is her rank from the bottom?
   (a) 54th (b) 53rd (c) 55th (d) 52nd
10. If '@' denotes '+', '#' denotes '−', '%' denotes '×', and '$' denotes '÷', evaluate: 144 $ 12 % 7 @ 45 # 30.
    (a) 99 (b) 97 (c) 101 (d) 95
11. Seventeen people sit in a row facing north. A sits at the left end. B sits immediately to the right of A. C sits twelfth to the right of B. How many people sit to the right of C?
    (a) 3 (b) 4 (c) 2 (d) 5
12. Statements: All clerks are staff members. Some staff members are volunteers. Conclusion: Some clerks are volunteers. Does this conclusion necessarily follow?
    (a) No, it does not necessarily follow (b) Yes, it follows validly (c) Only if all staff members are clerks (d) Cannot be determined
13. In a code, VERIFY is coded by each letter's position in the alphabet as 22-5-18-9-6-25. How is DETECT coded using the same rule?
    (a) 4-5-20-5-3-20 (b) 4-5-20-5-3-19 (c) 3-5-20-5-3-20 (d) 4-6-20-5-3-20
14. Find the missing number in the series: 1100, 990, 891, 801.9, ?
    (a) 721.71 (b) 715 (c) 725 (d) 710
15. A man is facing south. He turns 90° clockwise, then 90° anticlockwise, then 90° anticlockwise. Which direction is he facing now?
    (a) East (b) West (c) North (d) South
16. A is three times as old as B. Eleven years ago, A was five times as old as B. Find B's present age.
    (a) 22 years (b) 20 years (c) 24 years (d) 18 years
17. Find the missing number in the series: 22, 46, 94, 190, ?
    (a) 382 (b) 378 (c) 386 (d) 374
18. Which of the following is not a multiple of 16: 144, 160, 170, 176?
    (a) 170 (b) 144 (c) 160 (d) 176
19. Fifteen colleagues sit in a row facing north. D sits at the right end. E sits immediately to the left of D. F sits eleventh to the left of E. How many colleagues sit to the left of F?
    (a) 2 (b) 3 (c) 1 (d) 4
20. Statements: All investigators gather evidence. Everyone who gathers evidence writes reports. Conclusion: All investigators write reports. Does this follow?
    (a) Yes, it follows validly (b) No (c) Cannot be determined (d) Only partially
21. Find the missing number in the series: 10, 23, 49, 101, ?
    (a) 205 (b) 202 (c) 208 (d) 199
22. In the analogy "Blacksmith is to Anvil as Weaver is to ___," the missing word is:
    (a) Loom (b) Thread (c) Cloth (d) Needle
23. In a code, WINTER is coded as XJOUFS (each letter shifted one place forward). How is FREEDOM coded using the same rule?
    (a) GSFFEPN (b) GSFFEPM (c) FSFFEPN (d) GSFGEPN
24. In a row of 130 people, Ayaan is 58th from the left. What is his position from the right?
    (a) 73rd (b) 72nd (c) 74th (d) 71st
25. Statements: All observation posts have a clear line of sight. Nothing with a clear line of sight is easily concealed. Conclusion: No observation post is easily concealed. Does this follow?
    (a) Yes, it follows validly (b) No (c) Cannot be determined (d) Only partially

Section B: General Knowledge & Current Affairs (Q26–75)

26. Who was the first Indian to become a Test cricket captain?
    (a) C.K. Nayudu (b) Lala Amarnath (c) Vijay Hazare (d) Vinoo Mankad
27. Which Article of the Indian Constitution deals with the abolition of the practice of "begar" (forced labour)?
    (a) Article 23 (b) Article 21 (c) Article 19 (d) Article 32
28. Which Indian city is known as the "Handloom City of India"?
    (a) Bhagalpur (b) Varanasi (c) Kanchipuram (d) Chanderi
29. The Khilafat Movement, which Gandhi supported alongside the Non-Cooperation Movement, began in which year?
    (a) 1919 (b) 1920 (c) 1930 (d) 1942
30. Which is the largest crocodile sanctuary in India?
    (a) Bhitarkanika National Park (b) Madras Crocodile Bank (c) National Chambal Sanctuary (d) Katarniaghat Wildlife Sanctuary
31. Who was the Viceroy of India during the Quit India Movement?
    (a) Lord Linlithgow (b) Lord Wavell (c) Lord Mountbatten (d) Lord Willingdon
32. The Central Institute of Fisheries Technology is located in:
    (a) Kochi (b) Chennai (c) Mumbai (d) Visakhapatnam
33. Which award is given for the highest recognition in Indian literature?
    (a) Jnanpith Award (b) Sahitya Akademi Award (c) Padma Shri (d) Bharat Ratna
34. Who was the Chairman of the Constituent Assembly's Drafting Committee's advisory branch, formally called the Constitutional Advisor?
    (a) B.N. Rau (b) B.R. Ambedkar (c) Jawaharlal Nehru (d) Rajendra Prasad
35. Which Indian state has one of the largest numbers of registered handloom weavers among Indian states?
    (a) West Bengal (b) Tamil Nadu (c) Uttar Pradesh (d) Assam
36. The Simon Commission's report led to which subsequent conference?
    (a) The Round Table Conferences (b) The Shimla Conference (c) The Cripps Mission (d) The Cabinet Mission
37. Which is the largest producer of silk among Indian states?
    (a) Karnataka (b) West Bengal (c) Andhra Pradesh (d) Tamil Nadu
38. Who was the first Chief Minister of Kerala?
    (a) E.M.S. Namboodiripad (b) C. Achutha Menon (c) K. Karunakaran (d) A.K. Antony
39. Which Indian city is known as the "Textile City of India"?
    (a) Ahmedabad (b) Surat (c) Mumbai (d) Coimbatore
40. The Battle of Kanwaha was fought between Babur and which ruler?
    (a) Rana Sanga (b) Ibrahim Lodi (c) Sher Shah Suri (d) Hemu
41. Which is one of the largest protected mangrove ecosystems on India's western coast?
    (a) Gulf of Kutch mangroves (b) Sundarbans (c) Bhitarkanika (d) Pichavaram
42. Who founded the Indian Statistical Institute?
    (a) P.C. Mahalanobis (b) C.V. Raman (c) Homi Bhabha (d) Meghnad Saha
43. Which is the second highest peak in India after Kangchenjunga?
    (a) Nanda Devi (b) Nanga Parbat (c) Mount Kamet (d) Saltoro Kangri
44. The English gained trading rights in Bengal through a farman issued in which year?
    (a) 1717 (b) 1600 (c) 1757 (d) 1773
45. Which Indian state celebrates the "Rongali Bihu" as its most important festival?
    (a) Assam (b) West Bengal (c) Odisha (d) Tripura
46. Who was the first Indian to win a World Chess Championship title?
    (a) Viswanathan Anand (b) Pentala Harikrishna (c) R. Praggnanandhaa (d) D. Gukesh
47. Which channel separates Car Nicobar from the rest of the Nicobar Islands?
    (a) Sombrero Channel (b) Ten Degree Channel (c) Duncan Passage (d) Coco Channel
48. Who founded the Swaraj Party?
    (a) C.R. Das and Motilal Nehru (b) Jawaharlal Nehru alone (c) Subhas Chandra Bose (d) Sardar Patel
49. Which Indian city hosted the 2023 Cricket World Cup final?
    (a) Ahmedabad (b) Mumbai (c) Kolkata (d) New Delhi
50. The "Attlee Government" announced the transfer of power to India under which Prime Minister of Britain?
    (a) Clement Attlee (b) Winston Churchill (c) Neville Chamberlain (d) Stanley Baldwin
51. Which Indian state has one of the largest numbers of registered management institutes among Indian states?
    (a) Maharashtra (b) Tamil Nadu (c) Karnataka (d) Delhi
52. Who wrote the "Gitanjali," for which he won the Nobel Prize in Literature?
    (a) Rabindranath Tagore (b) Sarojini Naidu (c) R.K. Narayan (d) Mulk Raj Anand
53. Which is the largest producer of tobacco among Indian states?
    (a) Andhra Pradesh (b) Gujarat (c) Karnataka (d) Uttar Pradesh
54. India's first Five-Year Plan was launched in which year?
    (a) 1951 (b) 1947 (c) 1950 (d) 1956
55. Which Indian state is the largest producer of sunflower seeds?
    (a) Karnataka (b) Andhra Pradesh (c) Maharashtra (d) Tamil Nadu
56. Who was the first Indian to win the Wimbledon junior title?
    (a) Ramanathan Krishnan (b) Vijay Amritraj (c) Leander Paes (d) Sania Mirza
57. Which Indian city is known as the "Pearl City of India"?
    (a) Hyderabad (b) Chennai (c) Surat (d) Vishakhapatnam
58. The "Jan Aushadhi" scheme provides:
    (a) Affordable generic medicines (b) Free housing (c) Free legal aid (d) Rural employment
59. Which Indian state is known for the "Kaziranga National Park," home to the one-horned rhinoceros?
    (a) Assam (b) West Bengal (c) Odisha (d) Meghalaya
60. Who was the Prime Minister of India when the Pokhran-II nuclear tests were conducted in 1998?
    (a) Atal Bihari Vajpayee (b) P.V. Narasimha Rao (c) I.K. Gujral (d) H.D. Deve Gowda
61. Which is the highest peak of the Purvanchal Range in Northeast India?
    (a) Saramati (b) Japvo (c) Dzükou (d) Mount Everest
62. The "Startup India" initiative was launched in which year?
    (a) 2016 (b) 2010 (c) 2019 (d) 2005
63. Which Indian classical dance form combines martial art elements traditionally practised in Kerala?
    (a) Kathakali, drawing on Kalaripayattu traditions (b) Kathak (c) Odissi (d) Manipuri
64. Who founded the "Gadar Party" newspaper "Ghadr"?
    (a) Lala Hardayal (b) Shyamji Krishna Varma (c) V.D. Savarkar (d) Bhagat Singh
65. Which is the largest producer of jackfruit among Indian states?
    (a) Kerala (b) Karnataka (c) Tamil Nadu (d) Assam
66. The "Nehru Report" of 1928 proposed:
    (a) A constitutional framework for a self-governing India (b) Provincial autonomy only (c) A federation of princely states only (d) Complete Dyarchy
67. Which Indian state has one of the largest numbers of registered arts and science colleges among Indian states?
    (a) Tamil Nadu (b) Maharashtra (c) Karnataka (d) Andhra Pradesh
68. Who is considered the founder of the "Deendayal Upadhyaya"-inspired "Integral Humanism" philosophy?
    (a) Deendayal Upadhyaya (b) Syama Prasad Mookerjee (c) Balraj Madhok (d) Atal Bihari Vajpayee
69. Which is the largest producer of cauliflower among Indian states?
    (a) West Bengal (b) Uttar Pradesh (c) Bihar (d) Madhya Pradesh
70. The "Government of India Act, 1935" divided legislative powers into which lists?
    (a) Federal, Provincial, and Concurrent Lists (b) Union and State Lists only (c) Central and Local Lists only (d) A single unified list
71. Which Indian state is the largest producer of sesame seeds?
    (a) West Bengal (b) Rajasthan (c) Madhya Pradesh (d) Gujarat
72. Who wrote "Godan," a landmark Hindi novel?
    (a) Munshi Premchand (b) Jaishankar Prasad (c) Mahadevi Verma (d) Ramdhari Singh Dinkar
73. Which is the largest producer of watermelon among Indian states?
    (a) Uttar Pradesh (b) Madhya Pradesh (c) Karnataka (d) Andhra Pradesh
74. The "Government of India Act, 1858" transferred control of India from the East India Company to:
    (a) The British Crown (b) The British Parliament directly, without the Crown (c) A council of Indian princes (d) The Governor-General alone, without British oversight
75. Which Indian city is known as the "Cleanest City of India" in recent Swachh Survekshan rankings?
    (a) Indore (b) Surat (c) Mysuru (d) Bhopal

Section C: Numerical Ability (Q76–90)

76. Simplify: 225 ÷ 15 + 17 × 3 − 35.
    (a) 31 (b) 29 (c) 33 (d) 27
77. A sum of ₹56,000 amounts to ₹72,800 in 3 years at simple interest. Find the rate of interest per annum.
    (a) 10% (b) 8% (c) 12% (d) 9%
78. The ratio of two numbers is 13:17. If their sum is 210, find the larger number.
    (a) 119 (b) 115 (c) 123 (d) 111
79. A shopkeeper buys an article for ₹1,800 and sells it for ₹2,250. Find the profit percentage.
    (a) 25% (b) 20% (c) 30% (d) 15%
80. Find the average of the first seventy natural numbers.
    (a) 35.5 (b) 35 (c) 36 (d) 34.5
81. A train 440 m long crosses a pole in 44 seconds. Find its speed in km/h.
    (a) 36 km/h (b) 30 km/h (c) 40 km/h (d) 45 km/h
82. If the cost price of 80 articles equals the selling price of 64 articles, find the profit percentage.
    (a) 25% (b) 20% (c) 30% (d) 15%
83. Find the value of: 90% of 100 + 50% of 120.
    (a) 150 (b) 145 (c) 155 (d) 140
84. A and B together can complete a piece of work in 5 days. A alone can do it in 8 days. In how many days can B alone complete it?
    (a) 13.33 days (b) 12 days (c) 14 days (d) 11 days
85. Find the compound interest on ₹1,10,000 at 10% per annum for 2 years, compounded annually.
    (a) ₹23,100 (b) ₹22,000 (c) ₹24,000 (d) ₹21,500
86. Solve for x: 17(x − 14) = 10x − 28.
    (a) 30 (b) 29 (c) 31 (d) 28
87. Find the area of a circle with radius 70 cm (use π = 22/7).
    (a) 15,400 sq cm (b) 15,300 sq cm (c) 15,500 sq cm (d) 15,200 sq cm
88. A boat's speed in still water is 32 km/h; stream speed is 8 km/h. Find the time to cover 240 km downstream.
    (a) 6 hours (b) 6.5 hours (c) 5.5 hours (d) 7 hours
89. Find the missing number in the series: 45, 90, 180, 360, ?
    (a) 720 (b) 710 (c) 730 (d) 700
90. A sum of ₹1,80,000 is divided between A and B such that A's share is 400% more than B's. Find B's share.
    (a) ₹30,000 (b) ₹28,000 (c) ₹32,000 (d) ₹26,000

Section D: Computer Knowledge (Q91–100)

91. Which of the following is used to draw images and freehand sketches digitally?
    (a) A stylus and drawing tablet (b) A keyboard (c) A speaker (d) A printer
92. What does "CRT" stand for in older monitor technology?
    (a) Cathode Ray Tube (b) Cathode Radiation Tube (c) Compact Ray Tube (d) Compact Radiation Tube
93. Which of the following is used for accounting and financial calculations?
    (a) MS Excel (b) MS Word (c) MS PowerPoint (d) MS Paint
94. What is the full form of "SaaS" in cloud computing?
    (a) Software as a Service (b) System as a Service (c) Server as a Service (d) Storage as a Service
95. Which key combination is used to move to the end of a document?
    (a) Ctrl+End (b) Ctrl+Home (c) Ctrl+Page Down (d) Ctrl+Tab
96. Which of the following is an example of a spreadsheet formula function?
    (a) SUM (b) BOLD (c) ITALIC (d) UNDERLINE
97. What does "DNS" stand for in networking?
    (a) Domain Name System (b) Data Network System (c) Digital Name System (d) Domain Network Server
98. Which of the following is used to reduce the risk of losing unsaved work during a power failure?
    (a) Auto-save features (b) A word processor (c) A spreadsheet (d) A web browser
99. What does "PPT" commonly refer to as a file extension?
    (a) PowerPoint Presentation (b) Portable Print Text (c) Public Print Template (d) Personal Print Text
100. Which of the following is used to identify a device uniquely on a network at the hardware level?
     (a) MAC address (b) IP address only (c) Domain name (d) Port number

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Answer Key with Explanations

Section A:

1.(a) A pilot commands an aircraft, just as a captain commands a ship.

2.(a) Each term triples: 7×3=21, 21×3=63, 63×3=189, 189×3=567.

3.(a) Spinach, carrot, and potato are vegetables, while an apple is a fruit, making it the odd one out.

4.(a) Each letter shifts one place forward: C+1=D, H+1=I, E+1=F, R+1=S, R+1=S, Y+1=Z, giving DIFSSZ.

5.(a) By the Pythagorean theorem, distance = √(33²+56²) = √(1089+3136) = √4225 = 65 km.

6.(a) T is U's father, and V is T's father, so V is U's grandfather.

7.(a) The gaps increase by one each time: M(13)+3=P(16), P+4=T(20), T+5=Y(25), Y+6=AE(31).

8.(a) Since A≥B>C≥D, it follows directly that A≥D.

9.(a) Rank from the bottom = 95 − 42 + 1 = 54th.

10.(a) Following the order of operations: 144÷12=12, 12×7=84, 84+45=129, 129−30=99.

11.(a) A is at the left end (position 1); B is immediately right of A (position 2); C is twelfth to the right of B, so C is at position 2+12=14; with seventeen people in the row, 3 people sit to the right of C.

12.(a) No, this does not necessarily follow: the "some staff members" who are volunteers may or may not include the specific staff members who are clerks.

13.(a) Each letter is coded by its position in the alphabet; applying the same rule, DETECT is coded as 4-5-20-5-3-20.

14.(a) Each term is multiplied by 0.9: 1100×0.9=990, 990×0.9=891, 891×0.9=801.9, 801.9×0.9=721.71.

15.(a) The net turn is 90° clockwise plus 90° anticlockwise plus 90° anticlockwise, which equals 90° anticlockwise overall; facing south, a 90° anticlockwise turn gives east.

16.(a) Let B's present age be x and A's be 3x; eleven years ago, 3x−11 = 5(x−11), giving 3x−11 = 5x−55, so 2x=44, x=22.

17.(a) Each term follows ×2+2: 22×2+2=46, 46×2+2=94, 94×2+2=190, 190×2+2=382.

18.(a) 144, 160, and 176 are multiples of 16, while 170 is not.

19.(a) D is at the right end (position 15); E is immediately left of D (position 14); F is eleventh to the left of E, so F is at position 14−11=3; 2 colleagues sit to the left of F (positions 1 and 2).

20.(a) Yes, this follows validly: all investigators gather evidence, and everyone who gathers evidence writes reports, so all investigators write reports.

21.(a) Each term follows ×2+3: 10×2+3=23, 23×2+3=49, 49×2+3=101, 101×2+3=205.

22.(a) A blacksmith works at an anvil, just as a weaver works at a loom.

23.(a) Each letter shifts one place forward: F+1=G, R+1=S, E+1=F, E+1=F, D+1=E, O+1=P, M+1=N, giving GSFFEPN.

24.(a) Position from the right = 130 − 58 + 1 = 73rd.

25.(a) Yes, this follows validly: all observation posts have a clear line of sight, and nothing with a clear line of sight is easily concealed, so no observation post is easily concealed.

Section B:

26.(a) C.K. Nayudu was the first Indian to become a Test cricket captain.

27.(a) Article 23 abolishes the practice of "begar" (forced labour) and other forms of forced labour.

28.(a) Bhagalpur is known as the "Handloom City of India" for its silk weaving.

29.(a) The Khilafat Movement began in 1919.

30.(a) Bhitarkanika National Park is home to one of the largest crocodile populations in India.

31.(a) Lord Linlithgow was the Viceroy of India during the Quit India Movement.

32.(a) The Central Institute of Fisheries Technology is located in Kochi.

33.(a) The Jnanpith Award is the highest recognition in Indian literature.

34.(a) B.N. Rau served as the Constitutional Advisor to the Constituent Assembly.

35.(a) West Bengal has one of the largest numbers of registered handloom weavers among Indian states.

36.(a) The Simon Commission's report led to the Round Table Conferences.

37.(a) Karnataka is the largest producer of silk among Indian states.

38.(a) E.M.S. Namboodiripad was the first Chief Minister of Kerala.

39.(a) Ahmedabad is known as the "Textile City of India."

40.(a) The Battle of Kanwaha was fought between Babur and Rana Sanga.

41.(a) The Gulf of Kutch mangroves form one of the largest protected mangrove ecosystems on India's western coast.

42.(a) P.C. Mahalanobis founded the Indian Statistical Institute.

43.(a) Nanda Devi is the second highest peak in India after Kangchenjunga.

44.(a) The English gained trading rights in Bengal through a farman issued in 1717.

45.(a) Assam celebrates "Rongali Bihu" as its most important festival.

46.(a) Viswanathan Anand was the first Indian to win a World Chess Championship title.

47.(a) The Sombrero Channel separates Car Nicobar from the rest of the Nicobar Islands.

48.(a) C.R. Das and Motilal Nehru founded the Swaraj Party.

49.(a) Ahmedabad hosted the 2023 Cricket World Cup final.

50.(a) Clement Attlee, as British Prime Minister, announced the transfer of power to India.

51.(a) Maharashtra has one of the largest numbers of registered management institutes among Indian states.

52.(a) Rabindranath Tagore wrote "Gitanjali," for which he won the Nobel Prize in Literature.

53.(a) Andhra Pradesh is the largest producer of tobacco among Indian states.

54.(a) India's first Five-Year Plan was launched in 1951.

55.(a) Karnataka is the largest producer of sunflower seeds among Indian states.

56.(a) Ramanathan Krishnan was the first Indian to win the Wimbledon junior title.

57.(a) Hyderabad is known as the "Pearl City of India."

58.(a) The "Jan Aushadhi" scheme provides affordable generic medicines.

59.(a) Assam is known for the Kaziranga National Park, home to the one-horned rhinoceros.

60.(a) Atal Bihari Vajpayee was the Prime Minister of India when the Pokhran-II nuclear tests were conducted in 1998.

61.(a) Saramati is the highest peak of the Purvanchal Range in Northeast India.

62.(a) The "Startup India" initiative was launched in 2016.

63.(a) Kathakali, traditionally practised in Kerala, draws on the martial art traditions of Kalaripayattu.

64.(a) Lala Hardayal founded the newspaper "Ghadr" of the Gadar Party.

65.(a) Kerala is one of the largest producers of jackfruit among Indian states.

66.(a) The "Nehru Report" of 1928 proposed a constitutional framework for a self-governing India.

67.(a) Tamil Nadu has one of the largest numbers of registered arts and science colleges among Indian states.

68.(a) Deendayal Upadhyaya founded the "Integral Humanism" philosophy.

69.(a) West Bengal is one of the largest producers of cauliflower among Indian states.

70.(a) The Government of India Act, 1935, divided legislative powers into Federal, Provincial, and Concurrent Lists.

71.(a) West Bengal is one of the largest producers of sesame seeds among Indian states.

72.(a) Munshi Premchand wrote "Godan," a landmark Hindi novel.

73.(a) Uttar Pradesh is one of the largest producers of watermelon among Indian states.

74.(a) The Government of India Act, 1858, transferred control of India from the East India Company to the British Crown.

75.(a) Indore has been ranked the "Cleanest City of India" in recent Swachh Survekshan rankings.

Section C:

76.(a) 225÷15=15; 17×3=51; 15+51−35=31.

77.(a) Interest = 72,800−56,000 = ₹16,800 over 3 years; rate = (16,800×100)/(56,000×3) = 10%.

78.(a) The parts total 13+17=30; larger number = 210×17/30 = 119.

79.(a) Profit = 2,250−1,800 = ₹450; profit percentage = (450/1,800)×100 = 25%.

80.(a) The first seventy natural numbers sum to 2,485; average = 2,485/70 = 35.5.

81.(a) Speed = 440 m / 44 s = 10 m/s = 10×18/5 = 36 km/h.

82.(a) If CP of 80 articles equals SP of 64 articles, SP/CP per article = 80/64 = 1.25, a profit of 25%.

83.(a) 90% of 100 = 90; 50% of 120 = 60; sum = 150.

84.(a) Combined rate = 1/5; A's rate = 1/8; B's rate = 1/5−1/8 = 8/40−5/40 = 3/40, so B alone takes 40/3 = 13.33 days.

85.(a) Amount = 1,10,000×(1.10)² = 1,33,100; compound interest = ₹23,100.

86.(a) 17(x−14)=10x−28 gives 17x−238=10x−28, so 7x=210, x=30.

87.(a) Area = (22/7)×70² = 22×700 = 15,400 sq cm.

88.(a) Downstream speed = 32+8 = 40 km/h; time = 240/40 = 6 hours.

89.(a) Each term doubles: 45×2=90, 90×2=180, 180×2=360, 360×2=720.

90.(a) A's share is 5 times B's (400% more), so 6 parts = 1,80,000, giving B's share = ₹30,000.

Section D:

91.(a) A stylus and drawing tablet are used to draw images and freehand sketches digitally.

92.(a) CRT stands for Cathode Ray Tube.

93.(a) MS Excel is used for accounting and financial calculations.

94.(a) SaaS stands for Software as a Service.

95.(a) Ctrl+End is used to move to the end of a document.

96.(a) SUM is an example of a spreadsheet formula function.

97.(a) DNS stands for Domain Name System.

98.(a) Auto-save features reduce the risk of losing unsaved work during a power failure.

99.(a) PPT commonly refers to a PowerPoint Presentation file.

100.(a) A MAC address is used to identify a device uniquely on a network at the hardware level.