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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 873 · 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.If 11 erasers cost ₹33, how much do 18 erasers cost (in ₹)?
  2. 2.Round 40524 to the nearest thousand.
  3. 3.Find the LCM of 8, 10 and 12.
  4. 4.50% of a number is 67. What is the number?
  5. 5.The HCF of two numbers is 2 and their LCM is 48. One of the numbers is 6. What is the other number?
  6. 6.What is the smallest number you must add to 267 so that it divides exactly by 6?
  7. 7.Find the third proportional to 6 and 24 (that is, 6 : 24 = 24 : ?).
  8. 8.12% of a number is 18. What is the number?
  9. 9.A car goes 144 km on 6 litres of petrol. How far can it go on 16 litres (in km)?
  10. 10.Which is closest to 1604 ÷ 41? (a) 400 (b) 40 (c) 20 (d) 80
  11. 11.3/8 of 16 + 5 × 3 =
  12. 12.8 : 5 = 32 : ?
  13. 13.3.2 × 7 =
  14. 14.5 : 10 = 10 : ?
  15. 15.What is the smallest number you must add to 982 so that it divides exactly by 7?
  16. 16.How many factors does 71 have?
  17. 17.Two tanks hold 25 litres and 30 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  18. 18.The HCF of two numbers is 8 and their LCM is 160. One of the numbers is 40. What is the other number?
  19. 19.Round 31605 to the nearest thousand.
  20. 20.The ratio of boys to girls in a class is 1 : 4. There are 7 boys. How many girls are there?
  21. 21.Find the LCM of 12 and 8.
  22. 22.What is 5% of 440?
  23. 23.Two tanks hold 200 litres and 125 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  24. 24.What is the smallest number you must take away from 179 so that it divides exactly by 4?
  25. 25.Two tanks hold 20 litres and 45 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  26. 26.Find the smallest number bigger than 12 that leaves a remainder of 4 when divided by 5, 6 or 12.
  27. 27.Which of these numbers divides exactly by 9? (a) 6519 (b) 9047 (c) 2970 (d) 4264
  28. 28.11 : 3 = 99 : ?
  29. 29.If 3 erasers cost ₹141, how much do 12 erasers cost (in ₹)?
  30. 30.80% of a number is 220. What is the number?
  31. 31.Three temple bells ring every 5, 12 and 24 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  32. 32.Divide ₹80 between Farhan and Sneha in the ratio 1 : 9. How much does Farhan get (in ₹)?
  33. 33.Which is closest to 298 × 28? (Round each number first.) (a) 90000 (b) 9000 (c) 18000 (d) 900
  34. 34.8 : 14 = 32 : ?
  35. 35.81 ÷ 9 × 6 + 23 =
  36. 36.What is the smallest number you must take away from 825 so that it divides exactly by 7?
  37. 37.If 5 kg of rice costs ₹390, how many kg can you buy for ₹858?
  38. 38.How many factors does 90 have?
  39. 39.19 − 15 ÷ 5 × 4 =
  40. 40.Find the smallest number bigger than 12 that leaves a remainder of 2 when divided by 5, 10 or 12.

Answer key

  1. 54
  2. 41000
  3. 120
  4. 134
  5. 16
  6. 3
  7. 96
  8. 150
  9. 384
  10. 40
  11. 21
  12. 20
  13. 22.4
  14. 20
  15. 5
  16. 2
  17. 5
  18. 32
  19. 32000
  20. 28
  21. 24
  22. 22
  23. 25
  24. 3
  25. 5
  26. 64
  27. 2970
  28. 27
  29. 564
  30. 275
  31. 120
  32. 8
  33. 9000
  34. 56
  35. 77
  36. 6
  37. 11
  38. 12
  39. 7
  40. 62

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