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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 135 · 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.Write 7/10 as a percent.
  2. 2.Farhan takes 45 seconds and Ishaan takes 40 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?
  3. 3.What is 1/7 of ₹21?
  4. 4.3/11 − 1/4 =
  5. 5.Find the HCF of 33 and 55.
  6. 6.2.5 × 7 =
  7. 7.What percent of 40 is 20?
  8. 8.10 : 7 = 80 : ?
  9. 9.(9 + 6) × 3 − 17 =
  10. 10.What percent of 40 is 4?
  11. 11.The ratio of boys to girls in a class is 4 : 3. There are 16 boys. How many girls are there?
  12. 12.Find the third proportional to 5 and 25 (that is, 5 : 25 = 25 : ?).
  13. 13.Manav scored 10 marks out of 20 in a test. What percentage did Manav score?
  14. 14.If 3 kg of rice costs ₹186, how many kg can you buy for ₹124?
  15. 15.How many factors does 27 have?
  16. 16.Find the HCF of 70 and 90.
  17. 17.80% of a number is 272. What is the number?
  18. 18.How many factors does 89 have?
  19. 19.Divide ₹336 between Diya and Aarav in the ratio 3 : 5. How much does Aarav get (in ₹)?
  20. 20.The HCF of two numbers is 8 and their LCM is 112. One of the numbers is 16. What is the other number?
  21. 21.Two tanks hold 30 litres and 40 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  22. 22.10% of a number is 3. What is the number?
  23. 23.1/3 − 1/6 =
  24. 24.5.68 + 7.6 =
  25. 25.How many factors does 16 have?
  26. 26.5/6 of 24 + 6 × 8 =
  27. 27.What is 1/2 of ₹12?
  28. 28.Which is closest to 300 × 29? (Round each number first.) (a) 90000 (b) 9000 (c) 18000 (d) 900
  29. 29.Which is closest to 597 ÷ 31? (a) 20 (b) 200 (c) 10 (d) 40
  30. 30.How many factors does 68 have?
  31. 31.8 × (27 − 18) + 64 ÷ 8 =
  32. 32.2/5 − 1/4 =
  33. 33.Kabir takes 48 seconds and Meera 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?
  34. 34.The ratio of boys to girls in a class is 1 : 3. There are 4 boys. How many girls are there?
  35. 35.The HCF of two numbers is 8 and their LCM is 96. One of the numbers is 32. What is the other number?
  36. 36.2/3 × 2/7 =
  37. 37.What percent of 400 is 40?
  38. 38.How many factors does 100 have?
  39. 39.What is 50% of 132?
  40. 40.The HCF of two numbers is 6 and their LCM is 180. One of the numbers is 30. What is the other number?

Answer key

  1. 70
  2. 360
  3. 3
  4. 1/44
  5. 11
  6. 17.5
  7. 50
  8. 56
  9. 28
  10. 10
  11. 12
  12. 125
  13. 50
  14. 2
  15. 4
  16. 10
  17. 340
  18. 2
  19. 210
  20. 56
  21. 10
  22. 30
  23. 1/6
  24. 13.28
  25. 5
  26. 68
  27. 6
  28. 9000
  29. 20
  30. 6
  31. 80
  32. 3/20
  33. 240
  34. 12
  35. 24
  36. 4/21
  37. 10
  38. 9
  39. 66
  40. 36

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