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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 38 · 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 5% of 400?
  2. 2.9 : 8 = 72 : ?
  3. 3.Find the LCM of 35 and 30.
  4. 4.What is the smallest number you must add to 892 so that it divides exactly by 3?
  5. 5.The HCF of two numbers is 3 and their LCM is 36. One of the numbers is 9. What is the other number?
  6. 6.Find the HCF of 36 and 63.
  7. 7.The ratio of boys to girls in a class is 1 : 6. There are 5 boys. How many girls are there?
  8. 8.Find the LCM of 12, 4 and 15.
  9. 9.A hostel has enough food for 5 students for 10 days. How many days will the same food last for 10 students?
  10. 10.Two tanks hold 75 litres and 135 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  11. 11.What is 3/8 of 64 km?
  12. 12.15% of a number is 30. What is the number?
  13. 13.Find the LCM of 10, 3 and 6.
  14. 14.Round 28039 to the nearest ten.
  15. 15.What is the smallest number you must take away from 210 so that it divides exactly by 12?
  16. 16.If 9 kg of rice costs ₹639, how many kg can you buy for ₹213?
  17. 17.Round 60389 to the nearest thousand.
  18. 18.9 : 3 = 18 : ?
  19. 19.Find the LCM of 15 and 25.
  20. 20.A car goes 60 km on 4 litres of petrol. How far can it go on 39 litres (in km)?
  21. 21.The HCF of two numbers is 2 and their LCM is 20. One of the numbers is 4. What is the other number?
  22. 22.Round 77.68 to one decimal place. =
  23. 23.13 + 7 × 5 − 3 =
  24. 24.Find the third proportional to 8 and 16 (that is, 8 : 16 = 16 : ?).
  25. 25.14 ÷ 2 × 3 + 22 =
  26. 26.36 + 5 × 4 − 20 =
  27. 27.2 : 11 = 12 : ?
  28. 28.Nisha takes 40 seconds and Priya takes 48 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?
  29. 29.Round 93471 to the nearest hundred.
  30. 30.1/9 × 3/6 =
  31. 31.Find the third proportional to 6 and 30 (that is, 6 : 30 = 30 : ?).
  32. 32.Which is closest to 998 ÷ 21? (a) 50 (b) 100 (c) 25 (d) 500
  33. 33.What is 15% of 320?
  34. 34.Pooja scored 11 marks out of 20 in a test. What percentage did Pooja score?
  35. 35.Find the LCM of 5 and 2.
  36. 36.(11 + 5) × 9 − 29 =
  37. 37.The HCF of two numbers is 5 and their LCM is 30. One of the numbers is 15. What is the other number?
  38. 38.What percent of 50 is 17?
  39. 39.120% of a number is 90. What is the number?
  40. 40.Find the smallest number bigger than 10 that leaves a remainder of 2 when divided by 3, 8 or 10.

Answer key

  1. 20
  2. 64
  3. 210
  4. 2
  5. 12
  6. 9
  7. 30
  8. 60
  9. 5
  10. 15
  11. 24
  12. 200
  13. 30
  14. 28040
  15. 6
  16. 3
  17. 60000
  18. 6
  19. 75
  20. 585
  21. 10
  22. 77.7
  23. 45
  24. 32
  25. 43
  26. 36
  27. 66
  28. 240
  29. 93500
  30. 1/18
  31. 150
  32. 50
  33. 48
  34. 55
  35. 10
  36. 115
  37. 10
  38. 34
  39. 75
  40. 122

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