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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 24 · 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.The HCF of two numbers is 6 and their LCM is 108. One of the numbers is 12. What is the other number?
  2. 2.Which of these numbers divides exactly by 9? (a) 4995 (b) 7629 (c) 3570 (d) 9596
  3. 3.What percent of 20 is 5?
  4. 4.4.5 × 4 =
  5. 5.4/6 + 3/4 =
  6. 6.A hall floor is 200 cm long and 150 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  7. 7.30% of a number is 156. What is the number?
  8. 8.Find the smallest number bigger than 12 that leaves a remainder of 4 when divided by 12, 9 or 10.
  9. 9.What is the smallest number you must add to 449 so that it divides exactly by 12?
  10. 10.Two tanks hold 40 litres and 15 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  11. 11.Which of these numbers divides exactly by 8? (a) 5854 (b) 2401 (c) 1128 (d) 5549
  12. 12.Two tanks hold 150 litres and 250 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  13. 13.Kabir takes 40 seconds and Tara takes 90 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?
  14. 14.Find the smallest number bigger than 10 that leaves a remainder of 1 when divided by 3, 10 or 4.
  15. 15.37 + 12 × 3 − 13 =
  16. 16.What is 3/7 of 210 litres?
  17. 17.Find the LCM of 24 and 27.
  18. 18.Find the LCM of 16 and 18.
  19. 19.2/9 + 1/6 =
  20. 20.Write 2/25 as a percent.
  21. 21.Which is closest to 397 × 89? (Round each number first.) (a) 3600 (b) 72000 (c) 360000 (d) 36000
  22. 22.Which is closest to 800 + 897 + 705? (a) 2500 (b) 2400 (c) 2300 (d) 2600
  23. 23.Find the LCM of 4 and 9.
  24. 24.Find the LCM of 8 and 18.
  25. 25.40% of a number is 150. What is the number?
  26. 26.What is 1/4 of 64 km?
  27. 27.Find the LCM of 2, 14 and 6.
  28. 28.Two tanks hold 60 litres and 75 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  29. 29.Find the HCF of 90 and 40.
  30. 30.5 : 9 = 25 : ?
  31. 31.60 ÷ 6 × 2 + 10 =
  32. 32.Find the third proportional to 9 and 27 (that is, 9 : 27 = 27 : ?).
  33. 33.Two tanks hold 10 litres and 25 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  34. 34.What percent of 400 is 268?
  35. 35.What is the smallest number you must take away from 983 so that it divides exactly by 13?
  36. 36.What is the smallest number you must add to 146 so that it divides exactly by 8?
  37. 37.Which of these numbers divides exactly by 9? (a) 9684 (b) 5852 (c) 4191 (d) 2614
  38. 38.Write 4/5 as a percent.
  39. 39.Find the HCF of 12 and 16.
  40. 40.What is the smallest number you must take away from 294 so that it divides exactly by 12?

Answer key

  1. 54
  2. 4995
  3. 25
  4. 18
  5. 17/12
  6. 12
  7. 520
  8. 184
  9. 7
  10. 5
  11. 1128
  12. 50
  13. 360
  14. 61
  15. 60
  16. 90
  17. 216
  18. 144
  19. 7/18
  20. 8
  21. 36000
  22. 2400
  23. 36
  24. 72
  25. 375
  26. 16
  27. 42
  28. 15
  29. 10
  30. 45
  31. 30
  32. 81
  33. 5
  34. 67
  35. 8
  36. 6
  37. 9684
  38. 80
  39. 4
  40. 6

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