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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 694 · 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.A car goes 78 km on 6 litres of petrol. How far can it go on 3 litres (in km)?
  2. 2.Which is closest to 896 + 896 + 601? (a) 2400 (b) 2300 (c) 2600 (d) 2500
  3. 3.Three temple bells ring every 12, 10 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  4. 4.Which is closest to 2401 ÷ 29? (a) 40 (b) 80 (c) 160 (d) 800
  5. 5.Round 39.06 to one decimal place. =
  6. 6.What percent of 50 is 14?
  7. 7.The HCF of two numbers is 2 and their LCM is 72. One of the numbers is 18. What is the other number?
  8. 8.A hall floor is 300 cm long and 120 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  9. 9.60 ÷ 6 × 2 + 7 =
  10. 10.Find the LCM of 4, 12 and 9.
  11. 11.Three temple bells ring every 20, 4 and 24 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  12. 12.Find the third proportional to 4 and 12 (that is, 4 : 12 = 12 : ?).
  13. 13.Three temple bells ring every 15, 10 and 20 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  14. 14.5 : 12 = 25 : ?
  15. 15.Write 1/4 as a percent.
  16. 16.Two tanks hold 210 litres and 90 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  17. 17.8.8 ÷ 8 =
  18. 18.1/5 + 7/11 =
  19. 19.If 11 cricket balls cost ₹143, how much do 18 cricket balls cost (in ₹)?
  20. 20.Diya takes 54 seconds and Kavya takes 48 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?
  21. 21.Find the HCF of 112 and 42.
  22. 22.The HCF of two numbers is 2 and their LCM is 90. One of the numbers is 10. What is the other number?
  23. 23.8.32 + 4.7 =
  24. 24.1/8 × 2/12 =
  25. 25.Round 12.63 to one decimal place. =
  26. 26.A hall floor is 200 cm long and 175 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  27. 27.What is the smallest number you must add to 996 so that it divides exactly by 9?
  28. 28.What percent of 20 is 18?
  29. 29.Find the LCM of 12, 3 and 6.
  30. 30.What is 120% of 295?
  31. 31.Find the third proportional to 3 and 15 (that is, 3 : 15 = 15 : ?).
  32. 32.Which is closest to 600 + 101 + 504? (a) 1100 (b) 1400 (c) 1200 (d) 1300
  33. 33.10 : 15 = 80 : ?
  34. 34.What is the smallest number you must take away from 297 so that it divides exactly by 7?
  35. 35.Three temple bells ring every 24, 15 and 6 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  36. 36.150% of a number is 858. What is the number?
  37. 37.Find the third proportional to 6 and 30 (that is, 6 : 30 = 30 : ?).
  38. 38.1.8 × 3 =
  39. 39.Which is closest to 903 × 70? (Round each number first.) (a) 630000 (b) 6300 (c) 63000 (d) 126000
  40. 40.Find the third proportional to 4 and 16 (that is, 4 : 16 = 16 : ?).

Answer key

  1. 39
  2. 2400
  3. 120
  4. 80
  5. 39.1
  6. 28
  7. 8
  8. 10
  9. 27
  10. 36
  11. 120
  12. 36
  13. 60
  14. 60
  15. 25
  16. 30
  17. 1.1
  18. 46/55
  19. 234
  20. 432
  21. 14
  22. 18
  23. 13.02
  24. 1/48
  25. 12.6
  26. 56
  27. 3
  28. 90
  29. 12
  30. 354
  31. 75
  32. 1200
  33. 120
  34. 3
  35. 120
  36. 572
  37. 150
  38. 5.4
  39. 63000
  40. 64

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