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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 311 · 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 4 and their LCM is 180. One of the numbers is 20. What is the other number?
  2. 2.8 ÷ 2 × 5 + 15 =
  3. 3.Write 4/5 as a percent.
  4. 4.7 × (10 − 7) + 63 ÷ 9 =
  5. 5.What is 3/5 of 120 students?
  6. 6.Three temple bells ring every 30, 24 and 12 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  7. 7.What is 75% of 184?
  8. 8.Two tanks hold 75 litres and 135 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  9. 9.A hall floor is 100 cm long and 80 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  10. 10.Round 31.81 to one decimal place. =
  11. 11.Which is closest to 605 + 705 + 499? (a) 1700 (b) 1900 (c) 1800 (d) 2000
  12. 12.Which is closest to 704 × 59? (Round each number first.) (a) 420000 (b) 4200 (c) 42000 (d) 84000
  13. 13.What is the smallest number you must add to 512 so that it divides exactly by 3?
  14. 14.9.07 + 2.9 =
  15. 15.Find the third proportional to 2 and 4 (that is, 2 : 4 = 4 : ?).
  16. 16.Which is closest to 1604 ÷ 41? (a) 400 (b) 40 (c) 20 (d) 80
  17. 17.If 9 bottles of juice cost ₹531, how much do 19 bottles of juice cost (in ₹)?
  18. 18.12 : 3 = 108 : ?
  19. 19.80% of a number is 120. What is the number?
  20. 20.49 + 6 × 11 − 31 =
  21. 21.Find the LCM of 8 and 3.
  22. 22.If 3 cricket balls cost ₹39, how much do 4 cricket balls cost (in ₹)?
  23. 23.Find the LCM of 15 and 20.
  24. 24.2/4 + 1/2 =
  25. 25.Write 1/4 as a percent.
  26. 26.Find the smallest number bigger than 6 that leaves a remainder of 1 when divided by 5, 6 or 3.
  27. 27.What is the smallest number you must take away from 318 so that it divides exactly by 11?
  28. 28.What is the smallest number you must take away from 143 so that it divides exactly by 12?
  29. 29.6.3 × 2 =
  30. 30.6 × (21 − 6) + 45 ÷ 9 =
  31. 31.What is 2/3 of 6 litres?
  32. 32.Find the third proportional to 8 and 16 (that is, 8 : 16 = 16 : ?).
  33. 33.The ratio of boys to girls in a class is 6 : 7. There are 12 boys. How many girls are there?
  34. 34.Three temple bells ring every 5, 20 and 24 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  35. 35.Round 47834 to the nearest ten.
  36. 36.The HCF of two numbers is 7 and their LCM is 504. One of the numbers is 63. What is the other number?
  37. 37.1/8 of 24 + 8 × 8 =
  38. 38.The ratio of boys to girls in a class is 4 : 9. There are 40 boys. How many girls are there?
  39. 39.How many factors does 77 have?
  40. 40.Find the HCF of 75 and 45.

Answer key

  1. 36
  2. 35
  3. 80
  4. 28
  5. 72
  6. 120
  7. 138
  8. 15
  9. 20
  10. 31.8
  11. 1800
  12. 42000
  13. 1
  14. 11.97
  15. 8
  16. 40
  17. 1121
  18. 27
  19. 150
  20. 84
  21. 24
  22. 52
  23. 60
  24. 1
  25. 25
  26. 31
  27. 10
  28. 11
  29. 12.6
  30. 95
  31. 4
  32. 32
  33. 14
  34. 120
  35. 47830
  36. 56
  37. 67
  38. 90
  39. 4
  40. 15

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