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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 453 · 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 the smallest number you must take away from 496 so that it divides exactly by 12?
  2. 2.How many factors does 33 have?
  3. 3.9 : 8 = 63 : ?
  4. 4.4/6 + 2/5 =
  5. 5.Which is closest to 796 × 28? (Round each number first.) (a) 48000 (b) 2400 (c) 240000 (d) 24000
  6. 6.Two tanks hold 50 litres and 75 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  7. 7.1.56 + 4.1 =
  8. 8.How many factors does 62 have?
  9. 9.What is 1/2 of ₹34?
  10. 10.Which is closest to 903 × 29? (Round each number first.) (a) 27000 (b) 2700 (c) 54000 (d) 270000
  11. 11.12 ÷ 2 × 3 + 25 =
  12. 12.If 3 kg of rice costs ₹153, how many kg can you buy for ₹255?
  13. 13.Divide ₹192 between Dev and Ishaan in the ratio 3 : 1. How much does Dev get (in ₹)?
  14. 14.2 : 5 = 6 : ?
  15. 15.A hall floor is 175 cm long and 100 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  16. 16.2 × (23 − 13) + 8 ÷ 2 =
  17. 17.Kavya takes 40 seconds and Meera takes 75 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?
  18. 18.Write 1/2 as a percent.
  19. 19.Find the smallest number bigger than 10 that leaves a remainder of 4 when divided by 10, 9 or 5.
  20. 20.Round 37729 to the nearest hundred.
  21. 21.What is the smallest number you must take away from 753 so that it divides exactly by 12?
  22. 22.A car goes 160 km on 10 litres of petrol. How far can it go on 20 litres (in km)?
  23. 23.5.2 × 4 =
  24. 24.Find the LCM of 8, 6 and 7.
  25. 25.Round 52247 to the nearest hundred.
  26. 26.If 3 kg of rice costs ₹171, how many kg can you buy for ₹228?
  27. 27.Divide ₹24 between Arjun and Dev in the ratio 2 : 1. How much does Dev get (in ₹)?
  28. 28.Find the LCM of 48 and 42.
  29. 29.10 : 6 = 40 : ?
  30. 30.10% of a number is 37. What is the number?
  31. 31.Find the third proportional to 3 and 12 (that is, 3 : 12 = 12 : ?).
  32. 32.7/8 − 1/5 =
  33. 33.Two tanks hold 200 litres and 120 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  34. 34.The ratio of boys to girls in a class is 3 : 1. There are 21 boys. How many girls are there?
  35. 35.Find the HCF of 33 and 44.
  36. 36.2.31 + 3.3 =
  37. 37.A hostel has enough food for 6 students for 30 days. How many days will the same food last for 5 students?
  38. 38.6 × (20 − 10) + 48 ÷ 6 =
  39. 39.Two tanks hold 30 litres and 20 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  40. 40.Three temple bells ring every 12, 10 and 24 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?

Answer key

  1. 4
  2. 4
  3. 56
  4. 16/15
  5. 24000
  6. 25
  7. 5.66
  8. 4
  9. 17
  10. 27000
  11. 43
  12. 5
  13. 144
  14. 15
  15. 28
  16. 24
  17. 600
  18. 50
  19. 94
  20. 37700
  21. 9
  22. 320
  23. 20.8
  24. 168
  25. 52200
  26. 4
  27. 8
  28. 336
  29. 24
  30. 370
  31. 48
  32. 27/40
  33. 40
  34. 7
  35. 11
  36. 5.61
  37. 36
  38. 68
  39. 10
  40. 120

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