₹499 ₹999 · Full access — all mocks, practice sets & books · Unlock now
← Index: Delhi Police Constable — Complete GuideChapter 22
Study Guide · Chapter 22

Mock Test 8 — Delhi Police Constable Full Pattern (100 MCQs)

Free study material · concepts, shortcuts & solved questions

Select any text to highlight or save it

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 "Sculptor is to Chisel as Painter is to ___," the missing word is:
    (a) Brush (b) Canvas (c) Colour (d) Easel
  2. Find the missing number in the series: 2, 10, 50, 250, ?
    (a) 1250 (b) 1200 (c) 1300 (d) 1150
  3. Which one does not belong with the others: Rose, Jasmine, Marigold, Mango?
    (a) Mango (b) Rose (c) Jasmine (d) Marigold
  4. In a code, GLOBE is coded as HMPCF (each letter shifted one place forward). How is PLANET coded using the same rule?
    (a) QMBOFU (b) QMBOFV (c) PMBOFU (d) QMBPFU
  5. A woman walks 20 km east, then 21 km north. How far is she from her starting point?
    (a) 29 km (b) 32 km (c) 35 km (d) 25 km
  6. B is C's son. D is C's husband. How is D related to B?
    (a) Father (b) Uncle (c) Grandfather (d) Brother
  7. In the letter series G, J, N, S, ?, what is the next letter (gaps +3, +4, +5, next +6)?
    (a) Y (b) X (c) Z (d) W
  8. Given: E ≥ F > G ≥ H. Which of the following must be true?
    (a) E ≥ H (b) H > E (c) F < H (d) G > E
  9. In a class of 55 students, Naveen ranks 24th from the top. What is his rank from the bottom?
    (a) 32nd (b) 31st (c) 33rd (d) 30th
  10. If '@' denotes '+', '#' denotes '−', '%' denotes '×', and '$' denotes '÷', evaluate: 72 $ 8 % 2 @ 14 # 9.
    (a) 23 (b) 21 (c) 25 (d) 19
  11. Eleven people sit in a row facing north. K sits at the left end. L sits immediately to the right of K. M sits sixth to the right of L. How many people sit to the right of M?
    (a) 3 (b) 4 (c) 2 (d) 5
  12. Statements: All inspectors are officers. Some officers are trainers. Conclusion: Some inspectors are trainers. Does this conclusion necessarily follow?
    (a) No, it does not necessarily follow (b) Yes, it follows validly (c) Only if all officers are inspectors (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: 500, 450, 405, 364.5, ?
    (a) 328.05 (b) 320 (c) 330 (d) 325
  15. A woman is facing south. She turns 90° clockwise, then 90° clockwise, then 180°. Which direction is she facing now?
    (a) South (b) North (c) East (d) West
  16. A is five times as old as B. Six years ago, A was seventeen times as old as B. Find B's present age.
    (a) 8 years (b) 9 years (c) 7 years (d) 10 years
  17. Find the missing number in the series: 10, 22, 46, 94, ?
    (a) 190 (b) 188 (c) 192 (d) 186
  18. Which of the following is not a multiple of 8: 96, 104, 108, 112?
    (a) 108 (b) 96 (c) 104 (d) 112
  19. Nine colleagues sit in a row facing north. N sits at the right end. O sits immediately to the left of N. P sits fifth to the left of O. How many colleagues sit to the left of P?
    (a) 2 (b) 3 (c) 1 (d) 4
  20. Statements: All certified officers have undergone training. All trained personnel follow standard protocol. Conclusion: All certified officers follow standard protocol. 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: 9, 19, 39, 79, ?
    (a) 159 (b) 156 (c) 162 (d) 154
  22. In the analogy "Farmer is to Field as Fisherman is to ___," the missing word is:
    (a) Sea (b) Boat (c) Net (d) River
  23. In a code, WINTER is coded as XJOUFS (each letter shifted one place forward). How is GARDEN coded using the same rule?
    (a) HBSEFO (b) HBSEFN (c) GBSEFO (d) HBSDFO
  24. In a row of 84 people, Farhan is 35th from the left. What is his position from the right?
    (a) 50th (b) 49th (c) 51st (d) 48th
  25. Statements: All batons are equipment issued to officers. No issued equipment is personal property. Conclusion: No baton is personal property. 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)

  1. Who was the first Indian Governor-General of independent India?
    (a) C. Rajagopalachari (b) Lord Mountbatten (c) Rajendra Prasad (d) Sardar Patel
  2. Which Article of the Indian Constitution provides for Free Legal Aid?
    (a) Article 39A (b) Article 21 (c) Article 32 (d) Article 14
  3. Which Indian city is known as the "Garden City of India"?
    (a) Bengaluru (b) Chandigarh (c) Mysuru (d) Pune
  4. The Vernacular Press Act was passed in which year?
    (a) 1878 (b) 1857 (c) 1919 (d) 1935
  5. Which is the largest tiger reserve in India by area?
    (a) Nagarjunsagar-Srisailam (b) Corbett Tiger Reserve (c) Sundarbans Tiger Reserve (d) Kanha Tiger Reserve
  6. Who was the Viceroy of India during the First Round Table Conference?
    (a) Lord Irwin (b) Lord Willingdon (c) Lord Linlithgow (d) Lord Wavell
  7. The National Physical Laboratory of India is located in:
    (a) New Delhi (b) Pune (c) Bengaluru (d) Chennai
  8. Which is the fourth highest civilian award in India?
    (a) Padma Shri (b) Padma Bhushan (c) Bharat Ratna (d) Padma Vibhushan
  9. Who chaired the Drafting Committee of the Indian Constitution?
    (a) B.R. Ambedkar (b) Jawaharlal Nehru (c) Rajendra Prasad (d) Sardar Patel
  10. Which Indian state has the lowest population density?
    (a) Arunachal Pradesh (b) Sikkim (c) Mizoram (d) Nagaland
  11. The Government of India Act of 1858 was passed after which event?
    (a) The Revolt of 1857 (b) The Partition of Bengal (c) The Jallianwala Bagh massacre (d) The Quit India Movement
  12. Which is the national tree of India?
    (a) Banyan (b) Peepal (c) Neem (d) Mango
  13. Who was the first Chief Minister of independent India's Bombay State?
    (a) B.G. Kher (b) Morarji Desai (c) Y.B. Chavan (d) Vasantrao Naik
  14. Which Indian city is known as the "Space City of India" for its aerospace institutions?
    (a) Bengaluru (b) Thiruvananthapuram (c) Sriharikota (d) Hyderabad
  15. The Battle of Buxar was fought in which year?
    (a) 1764 (b) 1757 (c) 1857 (d) 1799
  16. Which is the largest National Park in India by area?
    (a) Hemis National Park (b) Desert National Park (c) Gir National Park (d) Kaziranga National Park
  17. Who founded the Satyashodhak Samaj?
    (a) Jyotirao Phule (b) B.R. Ambedkar (c) Ishwar Chandra Vidyasagar (d) Raja Ram Mohan Roy
  18. Which is the highest-altitude airport in India?
    (a) Kushok Bakula Rimpochee Airport, Leh (b) Shimla Airport (c) Kullu-Manali Airport (d) Gaggal Airport
  19. The English East India Company was granted a royal charter in which year?
    (a) 1600 (b) 1612 (c) 1757 (d) 1858
  20. Which Indian state is known as the "Land of the Rising Sun" in India, being the first to see sunrise?
    (a) Arunachal Pradesh (b) Assam (c) Nagaland (d) Manipur
  21. Who was the first Indian woman to become a High Court judge?
    (a) Anna Chandy (b) Fathima Beevi (c) Leila Seth (d) Sujata Manohar
  22. Which strait separates the Andaman and Nicobar Islands from each other?
    (a) Ten Degree Channel (b) Palk Strait (c) Gulf of Mannar (d) Eight Degree Channel
  23. Who founded the Servants of India Society?
    (a) Gopal Krishna Gokhale (b) Bal Gangadhar Tilak (c) Bipin Chandra Pal (d) Lala Lajpat Rai
  24. Which Indian city hosted the first Indian Premier League (IPL) final, in 2008?
    (a) Mumbai (b) Chennai (c) Bengaluru (d) Kolkata
  25. The "Cabinet Mission Plan" proposed a structure for India that included:
    (a) A federal union with provincial groupings (b) Direct partition into two nations (c) Continuation of British rule indefinitely (d) A unitary state with no provinces
  26. Which Indian state has the largest number of Legislative Assembly seats?
    (a) Uttar Pradesh (b) Maharashtra (c) West Bengal (d) Bihar
  27. Who wrote the Sanskrit drama "Abhijnanasakuntalam"?
    (a) Kalidasa (b) Banabhatta (c) Bhasa (d) Vishakhadatta
  28. Which is the largest salt lake in India, known for its extensive salt production?
    (a) Sambhar Lake (b) Chilika Lake (c) Pulicat Lake (d) Wular Lake
  29. The Poona Pact was signed between Gandhi and Ambedkar in which year?
    (a) 1932 (b) 1930 (c) 1935 (d) 1942
  30. Which Indian state is the largest producer of pulses?
    (a) Madhya Pradesh (b) Maharashtra (c) Rajasthan (d) Uttar Pradesh
  31. Who won India's first Olympic medals, in athletics at the 1900 Paris Olympics?
    (a) Norman Pritchard (b) K.D. Jadhav (c) Milkha Singh (d) Leander Paes
  32. Which Indian city is known as the "Athens of the East"?
    (a) Madurai (b) Varanasi (c) Thanjavur (d) Kanchipuram
  33. The "Operation Flood" programme in India is associated with:
    (a) Milk production (the White Revolution) (b) Flood control (c) Irrigation projects (d) Disaster relief
  34. Which Indian state was formed by bifurcating Madhya Pradesh in 2000?
    (a) Chhattisgarh (b) Jharkhand (c) Uttarakhand (d) Telangana
  35. Who was the President of India during the 1962 Sino-Indian War?
    (a) Dr. Rajendra Prasad (b) S. Radhakrishnan (c) Zakir Hussain (d) V.V. Giri
  36. Which is the highest peak in the Eastern Ghats?
    (a) Arma Konda (b) Mahendragiri (c) Jindhagada Peak (d) Doddabetta
  37. The "Operation Green" scheme in Indian agriculture focuses on:
    (a) Tomato, onion, and potato price stabilisation (b) Wheat production (c) Rice exports (d) Cotton subsidies
  38. Which Indian classical dance form originated in Manipur?
    (a) Manipuri (b) Kathak (c) Odissi (d) Mohiniyattam
  39. Who founded the Home Rule League in India along with Bal Gangadhar Tilak?
    (a) Annie Besant (b) Sarojini Naidu (c) Vijaya Lakshmi Pandit (d) Kamala Nehru
  40. Which is the largest producer of milk among Indian states?
    (a) Uttar Pradesh (b) Rajasthan (c) Madhya Pradesh (d) Gujarat
  41. The Government of India Act of 1935 provided for which of the following?
    (a) Provincial autonomy and an all-India federation (b) Complete independence (c) Partition of India (d) Abolition of princely states
  42. Which Indian state has the largest number of Below Poverty Line ration card beneficiaries, reflecting its large population?
    (a) Uttar Pradesh (b) Bihar (c) Madhya Pradesh (d) West Bengal
  43. Who is considered the founder of the Deoband movement?
    (a) Muhammad Qasim Nanautavi (b) Syed Ahmad Khan (c) Shah Waliullah (d) Maulana Azad
  44. Which is the northernmost point of India?
    (a) Indira Col (b) Kanyakumari (c) Siachen Base Camp (d) Leh
  45. The "Wavell Plan" was proposed in which year?
    (a) 1945 (b) 1946 (c) 1942 (d) 1935
  46. Which Indian state is the largest producer of maize?
    (a) Karnataka (b) Madhya Pradesh (c) Bihar (d) Uttar Pradesh
  47. Who wrote the patriotic song "Ae Mere Watan Ke Logo"?
    (a) Kavi Pradeep (b) Rabindranath Tagore (c) Muhammad Iqbal (d) Bankim Chandra Chatterjee
  48. Which is the largest producer of onions among Indian states?
    (a) Maharashtra (b) Karnataka (c) Madhya Pradesh (d) Gujarat
  49. The "Direct Action Day" called by the Muslim League took place in which year?
    (a) 1946 (b) 1940 (c) 1942 (d) 1947
  50. Which Indian city is known as the "City of Nawabs"?
    (a) Lucknow (b) Hyderabad (c) Bhopal (d) Rampur

Section C: Numerical Ability (Q76–90)

  1. Simplify: 144 ÷ 12 + 11 × 4 − 18.
    (a) 38 (b) 36 (c) 40 (d) 34
  2. A sum of ₹32,000 amounts to ₹41,600 in 3 years at simple interest. Find the rate of interest per annum.
    (a) 10% (b) 8% (c) 12% (d) 9%
  3. The ratio of two numbers is 8:9. If their sum is 170, find the larger number.
    (a) 90 (b) 85 (c) 95 (d) 80
  4. A shopkeeper buys an article for ₹1,080 and sells it for ₹1,350. Find the profit percentage.
    (a) 25% (b) 20% (c) 30% (d) 15%
  5. Find the average of the first forty natural numbers.
    (a) 20.5 (b) 20 (c) 21 (d) 19.5
  6. A train 240 m long crosses a pole in 24 seconds. Find its speed in km/h.
    (a) 36 km/h (b) 30 km/h (c) 40 km/h (d) 45 km/h
  7. If the cost price of 50 articles equals the selling price of 40 articles, find the profit percentage.
    (a) 25% (b) 20% (c) 30% (d) 15%
  8. Find the value of: 35% of 200 + 20% of 250.
    (a) 120 (b) 115 (c) 125 (d) 110
  9. A and B together can complete a piece of work in 30 days. A alone can do it in 50 days. In how many days can B alone complete it?
    (a) 75 days (b) 70 days (c) 80 days (d) 65 days
  10. Find the compound interest on ₹50,000 at 4% per annum for 2 years, compounded annually.
    (a) ₹4,080 (b) ₹4,000 (c) ₹4,200 (d) ₹3,900
  11. Solve for x: 12(x − 8) = 6x + 12.
    (a) 18 (b) 17 (c) 19 (d) 16
  12. Find the area of a circle with radius 14 cm (use π = 22/7).
    (a) 616 sq cm (b) 600 sq cm (c) 620 sq cm (d) 590 sq cm
  13. A boat's speed in still water is 22 km/h; stream speed is 3 km/h. Find the time to cover 100 km downstream.
    (a) 4 hours (b) 4.5 hours (c) 3.5 hours (d) 5 hours
  14. Find the missing number in the series: 20, 40, 80, 160, ?
    (a) 320 (b) 315 (c) 325 (d) 310
  15. A sum of ₹1,20,000 is divided between A and B such that A's share is 200% 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)

  1. Which of the following is used to display output from a computer visually?
    (a) Monitor (b) Keyboard (c) Mouse (d) Microphone
  2. What does "MAN" stand for in computer networking?
    (a) Metropolitan Area Network (b) Main Area Network (c) Managed Area Network (d) Multiple Area Network
  3. Which of the following is a note-taking and word processing software?
    (a) MS Word (b) MS Excel (c) MS PowerPoint (d) MS Access
  4. What does "TCP/IP" stand for?
    (a) Transmission Control Protocol/Internet Protocol (b) Total Control Protocol/Internal Protocol (c) Transfer Control Protocol/Information Protocol (d) Terminal Control Protocol/Internet Provider
  5. Which key combination is used to undo the last action?
    (a) Ctrl+Z (b) Ctrl+Y (c) Ctrl+X (d) Ctrl+A
  6. Which of the following is an example of cloud storage service?
    (a) Google Drive (b) MS Word (c) MS Excel (d) Adobe Reader
  7. What does "RFID" stand for?
    (a) Radio Frequency Identification (b) Radio Frequency Internet Device (c) Remote Frequency Identification (d) Radio Field Identification Device
  8. Which of the following best protects a computer network from unauthorised external access?
    (a) A firewall (b) A word processor (c) A spreadsheet (d) A web browser
  9. What does "GIF" stand for?
    (a) Graphics Interchange Format (b) General Image Format (c) Graphics Internal Format (d) General Interchange Format
  10. Which of the following is used to physically connect a computer to a wired network?
    (a) Ethernet cable (b) Wi-Fi adapter (c) Bluetooth (d) Infrared port

Answer Key with Explanations

Section A:

1.(a) A sculptor uses a chisel, just as a painter uses a brush.

2.(a) Each term is multiplied by 5: 2×5=10, 10×5=50, 50×5=250, 250×5=1250.

3.(a) Rose, jasmine, and marigold are flowers, while mango is a fruit, making it the odd one out.

4.(a) Each letter shifts one place forward: P+1=Q, L+1=M, A+1=B, N+1=O, E+1=F, T+1=U, giving QMBOFU.

5.(a) By the Pythagorean theorem, distance = √(20²+21²) = √(400+441) = √841 = 29 km.

6.(a) D is C's husband, and B is C's son, so D is B's father.

7.(a) The gaps increase by one each time: G(7)+3=J(10), J+4=N(14), N+5=S(19), S+6=Y(25).

8.(a) Since E≥F>G≥H, it follows directly that E≥H.

9.(a) Rank from the bottom = 55 − 24 + 1 = 32nd.

10.(a) Following the order of operations: 72÷8=9, 9×2=18, 18+14=32, 32−9=23.

11.(a) K is at the left end (position 1); L is immediately right of K (position 2); M is sixth to the right of L, so M is at position 2+6=8; with eleven people in the row, 3 people sit to the right of M.

12.(a) No, this does not necessarily follow: the "some officers" who are trainers may or may not include the specific officers who are inspectors.

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: 500×0.9=450, 450×0.9=405, 405×0.9=364.5, 364.5×0.9=328.05.

15.(a) The net turn is 90° clockwise plus 90° clockwise plus 180°, which equals 360° overall (a full turn), so facing south remains facing south.

16.(a) Let B's present age be x and A's be 5x; six years ago, 5x−6 = 17(x−6), giving 5x−6 = 17x−102, so 12x=96, x=8.

17.(a) Each term follows ×2+2: 10×2+2=22, 22×2+2=46, 46×2+2=94, 94×2+2=190.

18.(a) 96, 104, and 112 are multiples of 8, while 108 is not.

19.(a) N is at the right end (position 9); O is immediately left of N (position 8); P is fifth to the left of O, so P is at position 8−5=3; 2 people sit to the left of P (positions 1 and 2).

20.(a) Yes, this follows validly: all certified officers have undergone training, and all trained personnel follow standard protocol, so all certified officers follow standard protocol.

21.(a) Each term follows ×2+1: 9×2+1=19, 19×2+1=39, 39×2+1=79, 79×2+1=159.

22.(a) A farmer works in a field, just as a fisherman works at sea.

23.(a) Each letter shifts one place forward: G+1=H, A+1=B, R+1=S, D+1=E, E+1=F, N+1=O, giving HBSEFO.

24.(a) Position from the right = 84 − 35 + 1 = 50th.

25.(a) Yes, this follows validly: all batons are issued equipment, and no issued equipment is personal property, so no baton is personal property.

Section B:

26.(a) C. Rajagopalachari was the first Indian Governor-General of independent India.

27.(a) Article 39A provides for Free Legal Aid.

28.(a) Bengaluru is known as the "Garden City of India."

29.(a) The Vernacular Press Act was passed in 1878.

30.(a) Nagarjunsagar-Srisailam is the largest tiger reserve in India by area.

31.(a) Lord Irwin was the Viceroy of India during the First Round Table Conference.

32.(a) The National Physical Laboratory of India is located in New Delhi.

33.(a) The Padma Shri is the fourth highest civilian award in India.

34.(a) B.R. Ambedkar chaired the Drafting Committee of the Indian Constitution.

35.(a) Arunachal Pradesh has one of the lowest population densities among Indian states.

36.(a) The Government of India Act of 1858 was passed after the Revolt of 1857.

37.(a) The Banyan is the national tree of India.

38.(a) B.G. Kher was the first Chief Minister of independent India's Bombay State.

39.(a) Bengaluru is known as the "Space City of India" for its aerospace institutions.

40.(a) The Battle of Buxar was fought in 1764.

41.(a) Hemis National Park is the largest National Park in India by area.

42.(a) Jyotirao Phule founded the Satyashodhak Samaj.

43.(a) Kushok Bakula Rimpochee Airport in Leh is the highest-altitude airport in India.

44.(a) The English East India Company was granted a royal charter in 1600.

45.(a) Arunachal Pradesh is the first Indian state to see the sunrise.

46.(a) Anna Chandy was the first Indian woman to become a High Court judge.

47.(a) The Ten Degree Channel separates the Andaman Islands from the Nicobar Islands.

48.(a) Gopal Krishna Gokhale founded the Servants of India Society.

49.(a) Chennai hosted the first Indian Premier League (IPL) final, in 2008.

50.(a) The Cabinet Mission Plan proposed a federal union with provincial groupings.

51.(a) Uttar Pradesh has the largest number of Legislative Assembly seats among Indian states.

52.(a) Kalidasa wrote the Sanskrit drama "Abhijnanasakuntalam."

53.(a) Sambhar Lake is the largest salt lake in India, known for its extensive salt production.

54.(a) The Poona Pact was signed between Gandhi and Ambedkar in 1932.

55.(a) Madhya Pradesh is the largest producer of pulses among Indian states.

56.(a) Norman Pritchard won India's first Olympic medals, in athletics at the 1900 Paris Olympics.

57.(a) Madurai is known as the "Athens of the East."

58.(a) "Operation Flood" in India is associated with milk production, also called the White Revolution.

59.(a) Chhattisgarh was formed by bifurcating Madhya Pradesh in 2000.

60.(a) Dr. Rajendra Prasad was the President of India during the 1962 Sino-Indian War.

61.(a) Arma Konda is the highest peak in the Eastern Ghats.

62.(a) "Operation Green" in Indian agriculture focuses on tomato, onion, and potato price stabilisation.

63.(a) Manipuri originated in Manipur.

64.(a) Annie Besant founded the Home Rule League in India along with Bal Gangadhar Tilak.

65.(a) Uttar Pradesh is the largest producer of milk among Indian states.

66.(a) The Government of India Act of 1935 provided for provincial autonomy and an all-India federation.

67.(a) Uttar Pradesh has the largest number of Below Poverty Line ration card beneficiaries, reflecting its large population.

68.(a) Muhammad Qasim Nanautavi is considered the founder of the Deoband movement.

69.(a) Indira Col is the northernmost point of India.

70.(a) The "Wavell Plan" was proposed in 1945.

71.(a) Karnataka is the largest producer of maize among Indian states.

72.(a) Kavi Pradeep wrote the patriotic song "Ae Mere Watan Ke Logo."

73.(a) Maharashtra is the largest producer of onions among Indian states.

74.(a) The "Direct Action Day" called by the Muslim League took place in 1946.

75.(a) Lucknow is known as the "City of Nawabs."

Section C:

76.(a) 144÷12=12; 11×4=44; 12+44−18=38.

77.(a) Interest = 41,600−32,000 = ₹9,600 over 3 years; rate = (9,600×100)/(32,000×3) = 10%.

78.(a) The parts total 8+9=17; larger number = 170×9/17 = 90.

79.(a) Profit = 1,350−1,080 = ₹270; profit percentage = (270/1,080)×100 = 25%.

80.(a) The first forty natural numbers sum to 820; average = 820/40 = 20.5.

81.(a) Speed = 240 m / 24 s = 10 m/s = 10×18/5 = 36 km/h.

82.(a) If CP of 50 articles equals SP of 40 articles, SP/CP per article = 50/40 = 1.25, a profit of 25%.

83.(a) 35% of 200 = 70; 20% of 250 = 50; sum = 120.

84.(a) Combined rate = 1/30; A's rate = 1/50; B's rate = 1/30−1/50 = 5/150−3/150 = 2/150 = 1/75, so B alone takes 75 days.

85.(a) Amount = 50,000×(1.04)² = 54,080; compound interest = ₹4,080.

86.(a) 12(x−8)=6x+12 gives 12x−96=6x+12, so 6x=108, x=18.

87.(a) Area = (22/7)×14² = 22×28 = 616 sq cm.

88.(a) Downstream speed = 22+3 = 25 km/h; time = 100/25 = 4 hours.

89.(a) Each term doubles: 20×2=40, 40×2=80, 80×2=160, 160×2=320.

90.(a) A's share is 3 times B's (200% more), so 4 parts = 1,20,000, giving B's share = ₹30,000.

Section D:

91.(a) A monitor is used to display output from a computer visually.

92.(a) MAN stands for Metropolitan Area Network.

93.(a) MS Word is a note-taking and word processing software.

94.(a) TCP/IP stands for Transmission Control Protocol/Internet Protocol.

95.(a) Ctrl+Z is used to undo the last action.

96.(a) Google Drive is an example of a cloud storage service.

97.(a) RFID stands for Radio Frequency Identification.

98.(a) A firewall best protects a computer network from unauthorised external access.

99.(a) GIF stands for Graphics Interchange Format.

100.(a) An Ethernet cable is used to physically connect a computer to a wired network.

Page 1 of 1
← Chapter 21TOC IndexChapter 23