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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 161 · 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 67 have?
  2. 2.How many factors does 50 have?
  3. 3.What is the smallest number you must take away from 703 so that it divides exactly by 9?
  4. 4.Round 72.23 to one decimal place. =
  5. 5.1/2 + 1/4 =
  6. 6.Find the smallest number bigger than 15 that leaves a remainder of 1 when divided by 8, 4 or 15.
  7. 7.Find the third proportional to 9 and 27 (that is, 9 : 27 = 27 : ?).
  8. 8.The ratio of boys to girls in a class is 8 : 5. There are 48 boys. How many girls are there?
  9. 9.(8 + 20) × 6 − 11 =
  10. 10.8 ÷ 4 × 4 + 17 =
  11. 11.What is 20% of 495?
  12. 12.36 ÷ 6 × 7 + 4 =
  13. 13.2/9 of 90 + 6 × 2 =
  14. 14.28 + 6 × 8 − 28 =
  15. 15.Three temple bells ring every 24, 15 and 12 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  16. 16.Divide ₹63 between Priya and Ishaan in the ratio 6 : 1. How much does Priya get (in ₹)?
  17. 17.Write 1/4 as a percent.
  18. 18.15% of a number is 75. What is the number?
  19. 19.The HCF of two numbers is 7 and their LCM is 126. One of the numbers is 63. What is the other number?
  20. 20.10/12 + 1/2 =
  21. 21.Find the smallest number bigger than 12 that leaves a remainder of 3 when divided by 9, 12 or 4.
  22. 22.What is the smallest number you must add to 514 so that it divides exactly by 12?
  23. 23.Which of these numbers divides exactly by 9? (a) 1723 (b) 6669 (c) 9131 (d) 8250
  24. 24.What is 5% of 120?
  25. 25.Three temple bells ring every 5, 4 and 30 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  26. 26.Two tanks hold 135 litres and 225 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  27. 27.Which is closest to 303 + 202 + 897? (a) 1500 (b) 1400 (c) 1600 (d) 1300
  28. 28.7 : 13 = 42 : ?
  29. 29.If 10 cricket balls cost ₹370, how much do 5 cricket balls cost (in ₹)?
  30. 30.If 2 kg of rice costs ₹164, how many kg can you buy for ₹492?
  31. 31.Which is closest to 300 × 49? (Round each number first.) (a) 15000 (b) 1500 (c) 30000 (d) 150000
  32. 32.Which is closest to 298 × 22? (Round each number first.) (a) 600 (b) 12000 (c) 6000 (d) 60000
  33. 33.A hall floor is 420 cm long and 180 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  34. 34.6/12 − 2/5 =
  35. 35.6 : 12 = 18 : ?
  36. 36.Which is closest to 1492 ÷ 31? (a) 50 (b) 25 (c) 500 (d) 100
  37. 37.What is 120% of 570?
  38. 38.16.2 ÷ 6 =
  39. 39.Which is closest to 896 × 92? (Round each number first.) (a) 81000 (b) 8100 (c) 162000 (d) 810000
  40. 40.A car goes 32 km on 4 litres of petrol. How far can it go on 7 litres (in km)?

Answer key

  1. 2
  2. 6
  3. 1
  4. 72.2
  5. 3/4
  6. 121
  7. 81
  8. 30
  9. 157
  10. 25
  11. 99
  12. 46
  13. 32
  14. 48
  15. 120
  16. 54
  17. 25
  18. 500
  19. 14
  20. 4/3
  21. 39
  22. 2
  23. 6669
  24. 6
  25. 60
  26. 45
  27. 1400
  28. 78
  29. 185
  30. 6
  31. 15000
  32. 6000
  33. 21
  34. 1/10
  35. 36
  36. 50
  37. 684
  38. 2.7
  39. 81000
  40. 56

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