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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 589 · 40 questions
TalentJR

The method (Spot the type): Read the question and name the topic: HCF/LCM, fraction, ratio, percent … Use that lesson’s method and write each step. Check: is the answer sensible in size and units?

NameDateTime takenScore ___ / 40
  1. 1.3 × (18 − 16) + 30 ÷ 5 =
  2. 2.Which is closest to 2108 ÷ 31? (a) 140 (b) 700 (c) 70 (d) 35
  3. 3.7/10 × 5/6 =
  4. 4.A hostel has enough food for 5 students for 10 days. How many days will the same food last for 2 students?
  5. 5.Find the third proportional to 4 and 20 (that is, 4 : 20 = 20 : ?).
  6. 6.Find the LCM of 3, 15 and 10.
  7. 7.2 × (25 − 10) + 56 ÷ 7 =
  8. 8.2 × (15 − 1) + 40 ÷ 4 =
  9. 9.80% of a number is 24. What is the number?
  10. 10.(2 + 3) × 7 − 23 =
  11. 11.16 + 2 × 7 − 4 =
  12. 12.How many factors does 27 have?
  13. 13.A hostel has enough food for 8 students for 16 days. How many days will the same food last for 16 students?
  14. 14.A hall floor is 175 cm long and 50 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  15. 15.How many factors does 82 have?
  16. 16.Find the LCM of 9, 11 and 6.
  17. 17.Which is closest to 204 × 39? (Round each number first.) (a) 80000 (b) 8000 (c) 800 (d) 16000
  18. 18.Find the smallest number bigger than 15 that leaves a remainder of 3 when divided by 12, 15 or 4.
  19. 19.What is the smallest number you must add to 409 so that it divides exactly by 4?
  20. 20.Three temple bells ring every 12, 4 and 5 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  21. 21.Three temple bells ring every 5, 6 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  22. 22.What is the smallest number you must take away from 167 so that it divides exactly by 7?
  23. 23.1/12 + 2/4 =
  24. 24.A car goes 50 km on 5 litres of petrol. How far can it go on 20 litres (in km)?
  25. 25.Arjun takes 90 seconds and Dev takes 50 seconds to run once round a track. They start together from the start line. After how many seconds will they first be at the start line together again?
  26. 26.What percent of 20 is 19?
  27. 27.16 + 9 × 9 − 9 =
  28. 28.Which is closest to 704 + 700 + 495? (a) 2100 (b) 1900 (c) 2000 (d) 1800
  29. 29.How many factors does 52 have?
  30. 30.How many factors does 79 have?
  31. 31.How many factors does 89 have?
  32. 32.4.49 + 7.1 =
  33. 33.What is the smallest number you must add to 757 so that it divides exactly by 12?
  34. 34.Find the HCF of 28 and 21.
  35. 35.What percent of 80 is 28?
  36. 36.Three temple bells ring every 4, 6 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  37. 37.12% of a number is 66. What is the number?
  38. 38.Round 13.78 to one decimal place. =
  39. 39.If 4 kites cost ₹236, how much do 10 kites cost (in ₹)?
  40. 40.Find the third proportional to 8 and 16 (that is, 8 : 16 = 16 : ?).

Answer key

  1. 12
  2. 70
  3. 7/12
  4. 25
  5. 100
  6. 30
  7. 38
  8. 38
  9. 30
  10. 12
  11. 26
  12. 4
  13. 8
  14. 14
  15. 4
  16. 198
  17. 8000
  18. 63
  19. 3
  20. 60
  21. 120
  22. 6
  23. 7/12
  24. 200
  25. 450
  26. 95
  27. 88
  28. 1900
  29. 6
  30. 2
  31. 2
  32. 11.59
  33. 11
  34. 7
  35. 35
  36. 24
  37. 550
  38. 13.8
  39. 590
  40. 32

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