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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 243 · 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. 1.42 − 21 ÷ 3 × 3 =
  2. 2.24 ÷ 8 × 9 + 20 =
  3. 3.Which is closest to 504 + 198 + 396? (a) 1200 (b) 1300 (c) 1000 (d) 1100
  4. 4.2.9 × 7 =
  5. 5.If 3 erasers cost ₹75, how much do 20 erasers cost (in ₹)?
  6. 6.Three temple bells ring every 4, 8 and 6 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  7. 7.The ratio of boys to girls in a class is 4 : 3. There are 16 boys. How many girls are there?
  8. 8.4/11 × 1/5 =
  9. 9.If 7 cricket balls cost ₹259, how much do 8 cricket balls cost (in ₹)?
  10. 10.Find the LCM of 6, 9 and 8.
  11. 11.1/2 − 1/7 =
  12. 12.Find the HCF of 35 and 42.
  13. 13.1/5 + 6/11 =
  14. 14.Which is closest to 698 × 31? (Round each number first.) (a) 2100 (b) 42000 (c) 210000 (d) 21000
  15. 15.How many factors does 78 have?
  16. 16.The ratio of boys to girls in a class is 2 : 5. There are 18 boys. How many girls are there?
  17. 17.Find the LCM of 35 and 15.
  18. 18.Find the third proportional to 4 and 8 (that is, 4 : 8 = 8 : ?).
  19. 19.What is 120% of 15?
  20. 20.Which of these numbers divides exactly by 8? (a) 9808 (b) 7941 (c) 9186 (d) 3649
  21. 21.Find the smallest number bigger than 9 that leaves a remainder of 1 when divided by 9, 3 or 4.
  22. 22.Find the HCF of 55 and 22.
  23. 23.Sneha takes 45 seconds and Zoya takes 54 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?
  24. 24.Find the LCM of 12 and 20.
  25. 25.1/4 of 12 + 5 × 5 =
  26. 26.Find the LCM of 36 and 32.
  27. 27.1/8 × 4/5 =
  28. 28.What is 12% of 500?
  29. 29.Find the LCM of 12 and 32.
  30. 30.Two tanks hold 20 litres and 25 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  31. 31.Find the HCF of 70 and 20.
  32. 32.Round 15481 to the nearest thousand.
  33. 33.Find the HCF of 80 and 90.
  34. 34.(16 + 17) × 2 − 7 =
  35. 35.What percent of 250 is 190?
  36. 36.Which of these numbers divides exactly by 8? (a) 6308 (b) 3035 (c) 5503 (d) 3112
  37. 37.Three temple bells ring every 20, 24 and 5 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  38. 38.Find the LCM of 16 and 12.
  39. 39.Find the LCM of 10, 3 and 7.
  40. 40.Divide ₹660 between Sneha and Manav in the ratio 2 : 9. How much does Manav get (in ₹)?

Answer key

  1. 21
  2. 47
  3. 1100
  4. 20.3
  5. 500
  6. 24
  7. 12
  8. 4/55
  9. 296
  10. 72
  11. 5/14
  12. 7
  13. 41/55
  14. 21000
  15. 8
  16. 45
  17. 105
  18. 16
  19. 18
  20. 9808
  21. 37
  22. 11
  23. 270
  24. 60
  25. 28
  26. 288
  27. 1/10
  28. 60
  29. 96
  30. 5
  31. 10
  32. 15000
  33. 10
  34. 59
  35. 76
  36. 3112
  37. 120
  38. 48
  39. 210
  40. 540

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