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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 101 · 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.Which is closest to 296 × 38? (Round each number first.) (a) 24000 (b) 120000 (c) 12000 (d) 1200
  2. 2.1.2 × 8 =
  3. 3.The HCF of two numbers is 3 and their LCM is 120. One of the numbers is 24. What is the other number?
  4. 4.1/10 × 9/11 =
  5. 5.If 5 erasers cost ₹80, how much do 6 erasers cost (in ₹)?
  6. 6.The ratio of boys to girls in a class is 2 : 7. There are 18 boys. How many girls are there?
  7. 7.Write 1/10 as a percent.
  8. 8.Find the third proportional to 9 and 45 (that is, 9 : 45 = 45 : ?).
  9. 9.How many factors does 54 have?
  10. 10.How many factors does 93 have?
  11. 11.What is 15% of 340?
  12. 12.Two tanks hold 105 litres and 90 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  13. 13.Priya scored 3 marks out of 50 in a test. What percentage did Priya score?
  14. 14.How many factors does 95 have?
  15. 15.(9 + 18) × 2 − 30 =
  16. 16.1.8 × 3 =
  17. 17.1.88 + 1.8 =
  18. 18.What is the smallest number you must add to 317 so that it divides exactly by 11?
  19. 19.Divide ₹207 between Ananya and Rahul in the ratio 4 : 5. How much does Rahul get (in ₹)?
  20. 20.3/5 × 1/6 =
  21. 21.81 ÷ 9 × 5 + 25 =
  22. 22.3 painters can paint a school in 16 days. How many days would 16 painters take, working at the same speed?
  23. 23.A hall floor is 360 cm long and 135 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  24. 24.Which is closest to 204 × 18? (Round each number first.) (a) 4000 (b) 400 (c) 40000 (d) 8000
  25. 25.A hostel has enough food for 7 students for 11 days. How many days will the same food last for 11 students?
  26. 26.What percent of 200 is 26?
  27. 27.What is the smallest number you must take away from 682 so that it divides exactly by 12?
  28. 28.What is 12% of 600?
  29. 29.Find the smallest number bigger than 15 that leaves a remainder of 2 when divided by 4, 15 or 10.
  30. 30.1/11 + 3/4 =
  31. 31.What is 20% of 155?
  32. 32.1/3 × 3/4 =
  33. 33.How many factors does 21 have?
  34. 34.Two tanks hold 80 litres and 200 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  35. 35.Find the smallest number bigger than 12 that leaves a remainder of 1 when divided by 3, 9 or 12.
  36. 36.How many factors does 14 have?
  37. 37.If 5 kites cost ₹85, how much do 9 kites cost (in ₹)?
  38. 38.What is the smallest number you must add to 361 so that it divides exactly by 6?
  39. 39.The ratio of boys to girls in a class is 9 : 5. There are 72 boys. How many girls are there?
  40. 40.Two tanks hold 90 litres and 315 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?

Answer key

  1. 12000
  2. 9.6
  3. 15
  4. 9/110
  5. 96
  6. 63
  7. 10
  8. 225
  9. 8
  10. 4
  11. 51
  12. 15
  13. 6
  14. 4
  15. 24
  16. 5.4
  17. 3.68
  18. 2
  19. 115
  20. 1/10
  21. 70
  22. 3
  23. 24
  24. 4000
  25. 7
  26. 13
  27. 10
  28. 72
  29. 62
  30. 37/44
  31. 31
  32. 1/4
  33. 4
  34. 40
  35. 37
  36. 4
  37. 153
  38. 5
  39. 40
  40. 45

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