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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 524 · 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 77 have?
  2. 2.The ratio of boys to girls in a class is 3 : 5. There are 6 boys. How many girls are there?
  3. 3.Which of these numbers divides exactly by 9? (a) 8951 (b) 3005 (c) 3278 (d) 2493
  4. 4.A car goes 209 km on 11 litres of petrol. How far can it go on 27 litres (in km)?
  5. 5.The ratio of boys to girls in a class is 9 : 5. There are 45 boys. How many girls are there?
  6. 6.What is 3/7 of 112 kg?
  7. 7.A hall floor is 250 cm long and 200 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  8. 8.4/5 − 1/2 =
  9. 9.Find the HCF of 12 and 54.
  10. 10.How many factors does 67 have?
  11. 11.What is the smallest number you must take away from 658 so that it divides exactly by 3?
  12. 12.Aarav takes 72 seconds and Arjun 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?
  13. 13.Find the LCM of 15 and 10.
  14. 14.150% of a number is 99. What is the number?
  15. 15.Find the LCM of 21 and 27.
  16. 16.A hostel has enough food for 8 students for 11 days. How many days will the same food last for 2 students?
  17. 17.42 − 8 ÷ 2 × 7 =
  18. 18.9.73 + 6.3 =
  19. 19.Two tanks hold 15 litres and 20 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  20. 20.What is the smallest number you must add to 418 so that it divides exactly by 6?
  21. 21.What is 5/6 of ₹72?
  22. 22.If 10 notebooks cost ₹140, how much do 13 notebooks cost (in ₹)?
  23. 23.Which of these numbers divides exactly by 8? (a) 4626 (b) 6387 (c) 9143 (d) 6344
  24. 24.Find the LCM of 5 and 7.
  25. 25.What percent of 20 is 4?
  26. 26.If 7 kg of rice costs ₹315, how many kg can you buy for ₹270?
  27. 27.Find the LCM of 20 and 45.
  28. 28.What is 1/2 of 14 students?
  29. 29.What is 50% of 144?
  30. 30.What is the smallest number you must take away from 268 so that it divides exactly by 12?
  31. 31.Find the LCM of 14, 6 and 3.
  32. 32.Which is closest to 802 ÷ 39? (a) 200 (b) 40 (c) 10 (d) 20
  33. 33.The ratio of boys to girls in a class is 8 : 9. There are 72 boys. How many girls are there?
  34. 34.Round 17.24 to one decimal place. =
  35. 35.Three temple bells ring every 5, 30 and 24 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  36. 36.33 + 12 × 6 − 12 =
  37. 37.Three temple bells ring every 20, 6 and 4 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  38. 38.Find the HCF of 30 and 20.
  39. 39.Three temple bells ring every 24, 6 and 18 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  40. 40.3/4 − 1/10 =

Answer key

  1. 4
  2. 10
  3. 2493
  4. 513
  5. 25
  6. 48
  7. 20
  8. 3/10
  9. 6
  10. 2
  11. 1
  12. 360
  13. 30
  14. 66
  15. 189
  16. 44
  17. 14
  18. 16.03
  19. 5
  20. 2
  21. 60
  22. 182
  23. 6344
  24. 35
  25. 20
  26. 6
  27. 180
  28. 7
  29. 72
  30. 4
  31. 42
  32. 20
  33. 81
  34. 17.2
  35. 120
  36. 93
  37. 60
  38. 10
  39. 72
  40. 13/20

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