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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 168 · 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.Write 11/20 as a percent.
  2. 2.What is the smallest number you must add to 667 so that it divides exactly by 7?
  3. 3.Round 66623 to the nearest thousand.
  4. 4.What is the smallest number you must take away from 910 so that it divides exactly by 6?
  5. 5.Find the third proportional to 8 and 24 (that is, 8 : 24 = 24 : ?).
  6. 6.Find the LCM of 10 and 6.
  7. 7.A hall floor is 280 cm long and 80 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  8. 8.Which is closest to 200 × 68? (Round each number first.) (a) 140000 (b) 14000 (c) 1400 (d) 28000
  9. 9.Round 29.79 to one decimal place. =
  10. 10.A car goes 72 km on 9 litres of petrol. How far can it go on 5 litres (in km)?
  11. 11.81 ÷ 9 × 8 + 10 =
  12. 12.Find the LCM of 21 and 15.
  13. 13.10 : 12 = 90 : ?
  14. 14.Which is closest to 1801 ÷ 31? (a) 30 (b) 600 (c) 60 (d) 120
  15. 15.Round 95.61 to one decimal place. =
  16. 16.11 + 7 × 12 − 1 =
  17. 17.8 : 2 = 72 : ?
  18. 18.If 12 bottles of juice cost ₹312, how much do 20 bottles of juice cost (in ₹)?
  19. 19.How many factors does 60 have?
  20. 20.Two tanks hold 25 litres and 35 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  21. 21.42 − 18 ÷ 3 × 5 =
  22. 22.Three temple bells ring every 15, 9 and 10 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  23. 23.Which is closest to 397 × 80? (Round each number first.) (a) 3200 (b) 64000 (c) 32000 (d) 320000
  24. 24.Divide ₹594 between Ishaan and Farhan in the ratio 5 : 6. How much does Farhan get (in ₹)?
  25. 25.40% of a number is 148. What is the number?
  26. 26.Write 43/50 as a percent.
  27. 27.9.19 + 8.9 =
  28. 28.Two tanks hold 35 litres and 30 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  29. 29.Three temple bells ring every 8, 5 and 12 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  30. 30.Find the third proportional to 2 and 4 (that is, 2 : 4 = 4 : ?).
  31. 31.6/7 of 21 + 6 × 7 =
  32. 32.Two tanks hold 150 litres and 250 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  33. 33.If 12 erasers cost ₹132, how much do 17 erasers cost (in ₹)?
  34. 34.Two tanks hold 90 litres and 20 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  35. 35.4.6 × 7 =
  36. 36.Which is closest to 799 ÷ 39? (a) 40 (b) 10 (c) 200 (d) 20
  37. 37.What is 40% of 105?
  38. 38.Which is closest to 196 × 48? (Round each number first.) (a) 100000 (b) 10000 (c) 1000 (d) 20000
  39. 39.What is the smallest number you must take away from 132 so that it divides exactly by 13?
  40. 40.20 − 16 ÷ 8 × 2 =

Answer key

  1. 55
  2. 5
  3. 67000
  4. 4
  5. 72
  6. 30
  7. 14
  8. 14000
  9. 29.8
  10. 40
  11. 82
  12. 105
  13. 108
  14. 60
  15. 95.6
  16. 94
  17. 18
  18. 520
  19. 12
  20. 5
  21. 12
  22. 90
  23. 32000
  24. 324
  25. 370
  26. 86
  27. 18.09
  28. 5
  29. 120
  30. 8
  31. 60
  32. 50
  33. 187
  34. 10
  35. 32.2
  36. 20
  37. 42
  38. 10000
  39. 2
  40. 16

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