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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 455 · 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 ratio of boys to girls in a class is 5 : 3. There are 35 boys. How many girls are there?
  2. 2.How many factors does 98 have?
  3. 3.9 : 13 = 18 : ?
  4. 4.Which is closest to 299 × 21? (Round each number first.) (a) 6000 (b) 12000 (c) 60000 (d) 600
  5. 5.Two tanks hold 45 litres and 60 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  6. 6.Write 1/5 as a percent.
  7. 7.Three temple bells ring every 10, 30 and 9 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  8. 8.5.9 × 4 =
  9. 9.A hall floor is 200 cm long and 175 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  10. 10.6 ÷ 2 × 7 + 11 =
  11. 11.Find the third proportional to 8 and 16 (that is, 8 : 16 = 16 : ?).
  12. 12.What is the smallest number you must take away from 591 so that it divides exactly by 7?
  13. 13.(8 + 20) × 7 − 22 =
  14. 14.Three temple bells ring every 9, 8 and 4 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  15. 15.The ratio of boys to girls in a class is 7 : 6. There are 21 boys. How many girls are there?
  16. 16.The HCF of two numbers is 5 and their LCM is 75. One of the numbers is 25. What is the other number?
  17. 17.What is 1/8 of 80 kg?
  18. 18.3.71 + 9.5 =
  19. 19.If 10 notebooks cost ₹520, how much do 6 notebooks cost (in ₹)?
  20. 20.Which is closest to 1805 ÷ 29? (a) 120 (b) 60 (c) 30 (d) 600
  21. 21.Round 18.89 to one decimal place. =
  22. 22.Find the LCM of 8 and 28.
  23. 23.If 4 kg of rice costs ₹100, how many kg can you buy for ₹350?
  24. 24.5/10 × 1/2 =
  25. 25.(12 + 18) × 4 − 3 =
  26. 26.Find the LCM of 20 and 8.
  27. 27.1/2 − 3/8 =
  28. 28.Three temple bells ring every 10, 8 and 24 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  29. 29.18 + 4 × 10 − 5 =
  30. 30.What is the smallest number you must add to 296 so that it divides exactly by 6?
  31. 31.5/8 − 1/3 =
  32. 32.The ratio of boys to girls in a class is 7 : 1. There are 21 boys. How many girls are there?
  33. 33.What is the smallest number you must take away from 977 so that it divides exactly by 8?
  34. 34.Round 23962 to the nearest thousand.
  35. 35.How many factors does 35 have?
  36. 36.Two tanks hold 100 litres and 450 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  37. 37.Which of these numbers divides exactly by 11? (a) 7313 (b) 7092 (c) 8010 (d) 8470
  38. 38.Which of these numbers divides exactly by 8? (a) 1789 (b) 2715 (c) 6552 (d) 1706
  39. 39.What is the smallest number you must take away from 184 so that it divides exactly by 7?
  40. 40.Round 96.87 to one decimal place. =

Answer key

  1. 21
  2. 6
  3. 26
  4. 6000
  5. 15
  6. 20
  7. 90
  8. 23.6
  9. 56
  10. 32
  11. 32
  12. 3
  13. 174
  14. 72
  15. 18
  16. 15
  17. 10
  18. 13.21
  19. 312
  20. 60
  21. 18.9
  22. 56
  23. 14
  24. 1/4
  25. 117
  26. 40
  27. 1/8
  28. 120
  29. 53
  30. 4
  31. 7/24
  32. 3
  33. 1
  34. 24000
  35. 4
  36. 50
  37. 8470
  38. 6552
  39. 2
  40. 96.9

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