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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 673 · 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.What is 6/7 of 175 litres?
  2. 2.The ratio of boys to girls in a class is 8 : 7. There are 24 boys. How many girls are there?
  3. 3.Write 2/25 as a percent.
  4. 4.What percent of 50 is 47?
  5. 5.The HCF of two numbers is 3 and their LCM is 108. One of the numbers is 27. What is the other number?
  6. 6.24.3 ÷ 3 =
  7. 7.10/12 − 2/4 =
  8. 8.The ratio of boys to girls in a class is 5 : 4. There are 40 boys. How many girls are there?
  9. 9.The HCF of two numbers is 8 and their LCM is 280. One of the numbers is 40. What is the other number?
  10. 10.Which is closest to 298 × 20? (Round each number first.) (a) 600 (b) 12000 (c) 6000 (d) 60000
  11. 11.What is 80% of 15?
  12. 12.Round 74284 to the nearest thousand.
  13. 13.1/2 of 6 + 2 × 4 =
  14. 14.A hostel has enough food for 2 students for 6 days. How many days will the same food last for 6 students?
  15. 15.Find the HCF of 21 and 27.
  16. 16.What is the smallest number you must add to 127 so that it divides exactly by 9?
  17. 17.Find the HCF of 28 and 12.
  18. 18.7.24 + 1.8 =
  19. 19.Find the LCM of 12 and 18.
  20. 20.Find the third proportional to 4 and 8 (that is, 4 : 8 = 8 : ?).
  21. 21.Write 1/2 as a percent.
  22. 22.1/6 of 48 + 5 × 7 =
  23. 23.Which of these numbers divides exactly by 3? (a) 7477 (b) 4662 (c) 7486 (d) 6194
  24. 24.Find the LCM of 6, 3 and 10.
  25. 25.Find the HCF of 44 and 55.
  26. 26.2/3 of 27 + 4 × 8 =
  27. 27.Find the HCF of 35 and 63.
  28. 28.23 + 6 × 2 − 6 =
  29. 29.What is the smallest number you must add to 195 so that it divides exactly by 9?
  30. 30.15% of a number is 30. What is the number?
  31. 31.4/9 of 36 + 4 × 8 =
  32. 32.What is 80% of 195?
  33. 33.What is the smallest number you must take away from 713 so that it divides exactly by 6?
  34. 34.Find the HCF of 30 and 48.
  35. 35.Find the LCM of 42 and 24.
  36. 36.A car goes 46 km on 2 litres of petrol. How far can it go on 12 litres (in km)?
  37. 37.Find the LCM of 14 and 4.
  38. 38.Two tanks hold 405 litres and 90 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  39. 39.Priya takes 30 seconds and Pooja 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?
  40. 40.Find the LCM of 12, 8 and 10.

Answer key

  1. 150
  2. 21
  3. 8
  4. 94
  5. 12
  6. 8.1
  7. 1/3
  8. 32
  9. 56
  10. 6000
  11. 12
  12. 74000
  13. 11
  14. 2
  15. 3
  16. 8
  17. 4
  18. 9.04
  19. 36
  20. 16
  21. 50
  22. 43
  23. 4662
  24. 30
  25. 11
  26. 50
  27. 7
  28. 29
  29. 3
  30. 200
  31. 48
  32. 156
  33. 5
  34. 6
  35. 168
  36. 276
  37. 28
  38. 45
  39. 120
  40. 120

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