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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 668 · 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.The ratio of boys to girls in a class is 9 : 2. There are 90 boys. How many girls are there?
  2. 2.Find the HCF of 26 and 91.
  3. 3.What percent of 80 is 56?
  4. 4.1.84 + 1.5 =
  5. 5.3 : 6 = 18 : ?
  6. 6.What is 15% of 140?
  7. 7.What is 1/7 of 70 litres?
  8. 8.A hall floor is 420 cm long and 180 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  9. 9.Divide ₹245 between Rohan and Priya in the ratio 3 : 2. How much does Priya get (in ₹)?
  10. 10.21 ÷ 3 × 6 + 3 =
  11. 11.If 9 cricket balls cost ₹333, how much do 16 cricket balls cost (in ₹)?
  12. 12.Find the third proportional to 5 and 10 (that is, 5 : 10 = 10 : ?).
  13. 13.(10 + 6) × 7 − 1 =
  14. 14.5% of a number is 12. What is the number?
  15. 15.What is 20% of 275?
  16. 16.Two tanks hold 180 litres and 405 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  17. 17.What is the smallest number you must add to 265 so that it divides exactly by 3?
  18. 18.Which of these numbers divides exactly by 11? (a) 6155 (b) 1975 (c) 9647 (d) 3317
  19. 19.Find the LCM of 25 and 15.
  20. 20.Write 3/20 as a percent.
  21. 21.A hostel has enough food for 6 students for 18 days. How many days will the same food last for 12 students?
  22. 22.Find the LCM of 24 and 15.
  23. 23.The HCF of two numbers is 4 and their LCM is 40. One of the numbers is 8. What is the other number?
  24. 24.Find the smallest number bigger than 15 that leaves a remainder of 3 when divided by 10, 15 or 6.
  25. 25.5/8 + 6/10 =
  26. 26.What percent of 500 is 310?
  27. 27.The HCF of two numbers is 8 and their LCM is 448. One of the numbers is 64. What is the other number?
  28. 28.How many factors does 29 have?
  29. 29.The HCF of two numbers is 8 and their LCM is 168. One of the numbers is 24. What is the other number?
  30. 30.48 ÷ 4 × 6 + 2 =
  31. 31.Which is closest to 795 + 102 + 800? (a) 1900 (b) 1600 (c) 1800 (d) 1700
  32. 32.5.62 + 7.1 =
  33. 33.Which is closest to 604 ÷ 31? (a) 20 (b) 200 (c) 10 (d) 40
  34. 34.Which is closest to 302 × 90? (Round each number first.) (a) 54000 (b) 270000 (c) 27000 (d) 2700
  35. 35.What is 10% of 380?
  36. 36.Find the third proportional to 5 and 25 (that is, 5 : 25 = 25 : ?).
  37. 37.Find the LCM of 8, 6 and 2.
  38. 38.Which of these numbers divides exactly by 11? (a) 8393 (b) 1799 (c) 5757 (d) 5356
  39. 39.If 2 kg of rice costs ₹170, how many kg can you buy for ₹255?
  40. 40.Find the HCF of 10 and 8.

Answer key

  1. 20
  2. 13
  3. 70
  4. 3.34
  5. 36
  6. 21
  7. 10
  8. 21
  9. 98
  10. 45
  11. 592
  12. 20
  13. 111
  14. 240
  15. 55
  16. 45
  17. 2
  18. 9647
  19. 75
  20. 15
  21. 9
  22. 120
  23. 20
  24. 33
  25. 49/40
  26. 62
  27. 56
  28. 2
  29. 56
  30. 74
  31. 1700
  32. 12.72
  33. 20
  34. 27000
  35. 38
  36. 125
  37. 24
  38. 8393
  39. 3
  40. 2

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