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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 128 · 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. 1.5/7 + 2/6 =
  2. 2.Find the HCF of 21 and 15.
  3. 3.Find the LCM of 8 and 3.
  4. 4.1/2 × 6/9 =
  5. 5.Find the smallest number bigger than 10 that leaves a remainder of 1 when divided by 4, 3 or 10.
  6. 6.Round 34.73 to one decimal place. =
  7. 7.(2 + 9) × 4 − 11 =
  8. 8.Three temple bells ring every 8, 30 and 6 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  9. 9.2/7 − 1/6 =
  10. 10.How many factors does 76 have?
  11. 11.How many factors does 91 have?
  12. 12.Find the third proportional to 6 and 24 (that is, 6 : 24 = 24 : ?).
  13. 13.A hall floor is 315 cm long and 90 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  14. 14.The ratio of boys to girls in a class is 6 : 1. There are 18 boys. How many girls are there?
  15. 15.Which is closest to 202 × 38? (Round each number first.) (a) 8000 (b) 800 (c) 80000 (d) 16000
  16. 16.Find the HCF of 24 and 28.
  17. 17.What is the smallest number you must add to 101 so that it divides exactly by 8?
  18. 18.Which is closest to 991 ÷ 51? (a) 10 (b) 20 (c) 200 (d) 40
  19. 19.6 : 14 = 42 : ?
  20. 20.A car goes 120 km on 10 litres of petrol. How far can it go on 37 litres (in km)?
  21. 21.A hostel has enough food for 10 students for 24 days. How many days will the same food last for 12 students?
  22. 22.Find the LCM of 7 and 3.
  23. 23.Find the LCM of 30 and 24.
  24. 24.Find the smallest number bigger than 12 that leaves a remainder of 2 when divided by 4, 3 or 12.
  25. 25.Which is closest to 2408 ÷ 31? (a) 40 (b) 80 (c) 160 (d) 800
  26. 26.Find the HCF of 55 and 99.
  27. 27.Divide ₹225 between Kavya and Isha in the ratio 7 : 2. How much does Kavya get (in ₹)?
  28. 28.What is 25% of 52?
  29. 29.The ratio of boys to girls in a class is 7 : 2. There are 35 boys. How many girls are there?
  30. 30.The ratio of boys to girls in a class is 5 : 6. There are 35 boys. How many girls are there?
  31. 31.A hall floor is 150 cm long and 100 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  32. 32.10 : 3 = 20 : ?
  33. 33.Three temple bells ring every 30, 8 and 5 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  34. 34.Which is closest to 97 + 795 + 701? (a) 1800 (b) 1700 (c) 1500 (d) 1600
  35. 35.Find the LCM of 20 and 24.
  36. 36.33 + 7 × 5 − 5 =
  37. 37.Write 22/25 as a percent.
  38. 38.The ratio of boys to girls in a class is 1 : 2. There are 2 boys. How many girls are there?
  39. 39.Two tanks hold 75 litres and 50 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  40. 40.What is the smallest number you must add to 569 so that it divides exactly by 9?

Answer key

  1. 22/21
  2. 3
  3. 24
  4. 1/3
  5. 61
  6. 34.7
  7. 33
  8. 120
  9. 5/42
  10. 6
  11. 4
  12. 96
  13. 14
  14. 3
  15. 8000
  16. 4
  17. 3
  18. 20
  19. 98
  20. 444
  21. 20
  22. 21
  23. 120
  24. 14
  25. 80
  26. 11
  27. 175
  28. 13
  29. 10
  30. 42
  31. 6
  32. 6
  33. 120
  34. 1600
  35. 120
  36. 63
  37. 88
  38. 4
  39. 25
  40. 7

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