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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 1 · 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.Three temple bells ring every 12, 30 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  2. 2.Which is closest to 500 × 58? (Round each number first.) (a) 60000 (b) 3000 (c) 30000 (d) 300000
  3. 3.Three temple bells ring every 8, 12 and 30 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  4. 4.How many factors does 83 have?
  5. 5.Two tanks hold 80 litres and 120 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  6. 6.The ratio of boys to girls in a class is 9 : 4. There are 27 boys. How many girls are there?
  7. 7.Find the LCM of 2, 6 and 13.
  8. 8.6 ÷ 4 =
  9. 9.The ratio of boys to girls in a class is 2 : 9. There are 18 boys. How many girls are there?
  10. 10.What is 60% of 395?
  11. 11.What is the smallest number you must take away from 303 so that it divides exactly by 9?
  12. 12.A car goes 24 km on 3 litres of petrol. How far can it go on 11 litres (in km)?
  13. 13.8 : 3 = 64 : ?
  14. 14.2 × (28 − 14) + 27 ÷ 9 =
  15. 15.Find the HCF of 16 and 10.
  16. 16.5 × (14 − 10) + 27 ÷ 9 =
  17. 17.2 : 9 = 14 : ?
  18. 18.A hall floor is 300 cm long and 120 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  19. 19.What is the smallest number you must add to 147 so that it divides exactly by 4?
  20. 20.Which is closest to 296 × 41? (Round each number first.) (a) 1200 (b) 12000 (c) 120000 (d) 24000
  21. 21.Round 62.68 to one decimal place. =
  22. 22.Find the HCF of 24 and 21.
  23. 23.The ratio of boys to girls in a class is 8 : 1. There are 72 boys. How many girls are there?
  24. 24.How many factors does 12 have?
  25. 25.Which is closest to 299 + 495 + 296? (a) 1000 (b) 1300 (c) 1200 (d) 1100
  26. 26.Write 3/10 as a percent.
  27. 27.1/2 − 2/6 =
  28. 28.Find the LCM of 5, 3 and 11.
  29. 29.Find the LCM of 8 and 28.
  30. 30.Rohan takes 40 seconds and Dev takes 60 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?
  31. 31.5/9 of 63 + 5 × 7 =
  32. 32.Find the smallest number bigger than 15 that leaves a remainder of 2 when divided by 9, 15 or 12.
  33. 33.Which is closest to 498 + 696 + 598? (a) 1900 (b) 1700 (c) 1800 (d) 2000
  34. 34.Which of these numbers divides exactly by 8? (a) 5879 (b) 1282 (c) 4504 (d) 7777
  35. 35.Find the HCF of 48 and 36.
  36. 36.What is 80% of 450?
  37. 37.Find the LCM of 14 and 18.
  38. 38.1/3 of 30 + 2 × 2 =
  39. 39.2 × (20 − 11) + 21 ÷ 7 =
  40. 40.Three temple bells ring every 15, 24 and 5 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?

Answer key

  1. 120
  2. 30000
  3. 120
  4. 2
  5. 40
  6. 12
  7. 78
  8. 1.5
  9. 81
  10. 237
  11. 6
  12. 88
  13. 24
  14. 31
  15. 2
  16. 23
  17. 63
  18. 10
  19. 1
  20. 12000
  21. 62.7
  22. 3
  23. 9
  24. 6
  25. 1100
  26. 30
  27. 1/6
  28. 165
  29. 56
  30. 120
  31. 70
  32. 182
  33. 1800
  34. 4504
  35. 12
  36. 360
  37. 126
  38. 14
  39. 21
  40. 120

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