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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 19 · 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 687 so that it divides exactly by 9?
  2. 2.4.6 × 6 =
  3. 3.What is 50% of 314?
  4. 4.Which is closest to 396 × 20? (Round each number first.) (a) 80000 (b) 800 (c) 8000 (d) 16000
  5. 5.The ratio of boys to girls in a class is 8 : 5. There are 24 boys. How many girls are there?
  6. 6.What is the smallest number you must add to 627 so that it divides exactly by 8?
  7. 7.If 12 notebooks cost ₹180, how much do 4 notebooks cost (in ₹)?
  8. 8.Find the third proportional to 2 and 4 (that is, 2 : 4 = 4 : ?).
  9. 9.Divide ₹114 between Kabir and Sneha in the ratio 1 : 2. How much does Kabir get (in ₹)?
  10. 10.2 painters can paint a school in 17 days. How many days would 17 painters take, working at the same speed?
  11. 11.Round 88.86 to one decimal place. =
  12. 12.A hall floor is 125 cm long and 75 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  13. 13.75% of a number is 78. What is the number?
  14. 14.Three temple bells ring every 30, 8 and 10 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  15. 15.A hall floor is 175 cm long and 50 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  16. 16.36 ÷ 9 × 5 + 28 =
  17. 17.Find the HCF of 25 and 20.
  18. 18.The HCF of two numbers is 8 and their LCM is 48. One of the numbers is 16. What is the other number?
  19. 19.A car goes 54 km on 6 litres of petrol. How far can it go on 31 litres (in km)?
  20. 20.What is 5% of 400?
  21. 21.What is 75% of 56?
  22. 22.Find the third proportional to 3 and 9 (that is, 3 : 9 = 9 : ?).
  23. 23.What is 2/3 of 12 litres?
  24. 24.8/9 + 2/12 =
  25. 25.The HCF of two numbers is 9 and their LCM is 135. One of the numbers is 45. What is the other number?
  26. 26.Divide ₹649 between Vivaan and Aarav in the ratio 5 : 6. How much does Vivaan get (in ₹)?
  27. 27.Find the LCM of 30 and 35.
  28. 28.The HCF of two numbers is 4 and their LCM is 72. One of the numbers is 8. What is the other number?
  29. 29.What is the smallest number you must add to 458 so that it divides exactly by 3?
  30. 30.What is the smallest number you must take away from 250 so that it divides exactly by 13?
  31. 31.Write 1/2 as a percent.
  32. 32.Write 7/20 as a percent.
  33. 33.Find the LCM of 18 and 21.
  34. 34.What is the smallest number you must take away from 424 so that it divides exactly by 9?
  35. 35.Round 12864 to the nearest thousand.
  36. 36.Which is closest to 1799 ÷ 19? (a) 180 (b) 45 (c) 900 (d) 90
  37. 37.Which is closest to 3503 ÷ 49? (a) 35 (b) 140 (c) 70 (d) 700
  38. 38.What is the smallest number you must take away from 572 so that it divides exactly by 7?
  39. 39.Two tanks hold 60 litres and 160 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  40. 40.The ratio of boys to girls in a class is 3 : 4. There are 21 boys. How many girls are there?

Answer key

  1. 3
  2. 27.6
  3. 157
  4. 8000
  5. 15
  6. 5
  7. 60
  8. 8
  9. 38
  10. 2
  11. 88.9
  12. 15
  13. 104
  14. 120
  15. 14
  16. 48
  17. 5
  18. 24
  19. 279
  20. 20
  21. 42
  22. 27
  23. 8
  24. 19/18
  25. 27
  26. 295
  27. 210
  28. 36
  29. 1
  30. 3
  31. 50
  32. 35
  33. 126
  34. 1
  35. 13000
  36. 90
  37. 70
  38. 5
  39. 20
  40. 28

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