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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 50 · 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.How many factors does 91 have?
  2. 2.Find the third proportional to 6 and 18 (that is, 6 : 18 = 18 : ?).
  3. 3.The HCF of two numbers is 3 and their LCM is 135. One of the numbers is 27. What is the other number?
  4. 4.1/7 + 3/6 =
  5. 5.A hall floor is 160 cm long and 60 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  6. 6.Round 28909 to the nearest hundred.
  7. 7.Round 53403 to the nearest ten.
  8. 8.(12 + 13) × 8 − 18 =
  9. 9.Write 7/25 as a percent.
  10. 10.Write 23/25 as a percent.
  11. 11.50% of a number is 47. What is the number?
  12. 12.What percent of 500 is 165?
  13. 13.Find the smallest number bigger than 10 that leaves a remainder of 2 when divided by 10, 5 or 9.
  14. 14.Which of these numbers divides exactly by 4? (a) 1640 (b) 9730 (c) 3018 (d) 5085
  15. 15.What is 12% of 75?
  16. 16.2/4 + 1/6 =
  17. 17.The HCF of two numbers is 4 and their LCM is 144. One of the numbers is 16. What is the other number?
  18. 18.If 12 bottles of juice cost ₹48, how much do 14 bottles of juice cost (in ₹)?
  19. 19.48 ÷ 5 =
  20. 20.Ishaan takes 50 seconds and Isha 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?
  21. 21.Find the LCM of 2, 12 and 8.
  22. 22.Find the LCM of 9 and 2.
  23. 23.Find the HCF of 4 and 14.
  24. 24.1/6 + 4/5 =
  25. 25.How many factors does 62 have?
  26. 26.80% of a number is 108. What is the number?
  27. 27.26 ÷ 5 =
  28. 28.9 : 14 = 45 : ?
  29. 29.If 5 kg of rice costs ₹185, how many kg can you buy for ₹111?
  30. 30.Which is closest to 702 × 81? (Round each number first.) (a) 5600 (b) 56000 (c) 560000 (d) 112000
  31. 31.What percent of 40 is 4?
  32. 32.Find the HCF of 28 and 12.
  33. 33.What is the smallest number you must take away from 827 so that it divides exactly by 3?
  34. 34.If 2 kg of rice costs ₹100, how many kg can you buy for ₹300?
  35. 35.Three temple bells ring every 20, 12 and 10 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  36. 36.What is the smallest number you must take away from 678 so that it divides exactly by 12?
  37. 37.Find the smallest number bigger than 15 that leaves a remainder of 1 when divided by 10, 15 or 3.
  38. 38.Three temple bells ring every 30, 12 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  39. 39.Isha takes 54 seconds and Farhan takes 30 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 20 and 28.

Answer key

  1. 4
  2. 54
  3. 15
  4. 9/14
  5. 24
  6. 28900
  7. 53400
  8. 182
  9. 28
  10. 92
  11. 94
  12. 33
  13. 92
  14. 1640
  15. 9
  16. 2/3
  17. 36
  18. 56
  19. 9.6
  20. 300
  21. 24
  22. 18
  23. 2
  24. 29/30
  25. 4
  26. 135
  27. 5.2
  28. 70
  29. 3
  30. 56000
  31. 10
  32. 4
  33. 2
  34. 6
  35. 60
  36. 6
  37. 31
  38. 120
  39. 270
  40. 140

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