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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 488 · 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.Which is closest to 697 × 40? (Round each number first.) (a) 280000 (b) 56000 (c) 28000 (d) 2800
  2. 2.The HCF of two numbers is 4 and their LCM is 24. One of the numbers is 8. What is the other number?
  3. 3.Find the smallest number bigger than 15 that leaves a remainder of 5 when divided by 15, 12 or 10.
  4. 4.Which of these numbers divides exactly by 6? (a) 2020 (b) 8456 (c) 3715 (d) 3360
  5. 5.8/12 − 7/11 =
  6. 6.A car goes 42 km on 3 litres of petrol. How far can it go on 27 litres (in km)?
  7. 7.What is the smallest number you must take away from 694 so that it divides exactly by 9?
  8. 8.2/9 of 54 + 2 × 6 =
  9. 9.What is 75% of 372?
  10. 10.What is the smallest number you must add to 890 so that it divides exactly by 13?
  11. 11.The HCF of two numbers is 4 and their LCM is 56. One of the numbers is 8. What is the other number?
  12. 12.Find the LCM of 9, 3 and 7.
  13. 13.Find the HCF of 12 and 32.
  14. 14.Three temple bells ring every 10, 15 and 24 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  15. 15.Find the HCF of 15 and 21.
  16. 16.2/10 × 2/7 =
  17. 17.Two tanks hold 405 litres and 225 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 96. One of the numbers is 32. What is the other number?
  19. 19.Find the LCM of 14, 9 and 6.
  20. 20.5 : 13 = 40 : ?
  21. 21.3/5 − 2/4 =
  22. 22.Round 10.41 to one decimal place. =
  23. 23.Find the third proportional to 3 and 6 (that is, 3 : 6 = 6 : ?).
  24. 24.2/10 − 1/9 =
  25. 25.What is the smallest number you must take away from 489 so that it divides exactly by 7?
  26. 26.What percent of 20 is 8?
  27. 27.1/6 + 1/5 =
  28. 28.Two tanks hold 175 litres and 150 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  29. 29.Which is closest to 804 + 102 + 298? (a) 1200 (b) 1400 (c) 1100 (d) 1300
  30. 30.Write 1/4 as a percent.
  31. 31.Write 17/25 as a percent.
  32. 32.Nisha takes 72 seconds and Arjun takes 54 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?
  33. 33.9/10 − 2/9 =
  34. 34.The ratio of boys to girls in a class is 7 : 5. There are 35 boys. How many girls are there?
  35. 35.2.2 × 6 =
  36. 36.Which is closest to 1493 ÷ 31? (a) 25 (b) 100 (c) 50 (d) 500
  37. 37.Round 24.16 to one decimal place. =
  38. 38.What is the smallest number you must add to 913 so that it divides exactly by 12?
  39. 39.Find the LCM of 3 and 5.
  40. 40.30 ÷ 3 × 2 + 15 =

Answer key

  1. 28000
  2. 12
  3. 65
  4. 3360
  5. 1/33
  6. 378
  7. 1
  8. 24
  9. 279
  10. 7
  11. 28
  12. 63
  13. 4
  14. 120
  15. 3
  16. 2/35
  17. 45
  18. 24
  19. 126
  20. 104
  21. 1/10
  22. 10.4
  23. 12
  24. 4/45
  25. 6
  26. 40
  27. 11/30
  28. 25
  29. 1200
  30. 25
  31. 68
  32. 216
  33. 61/90
  34. 25
  35. 13.2
  36. 50
  37. 24.2
  38. 11
  39. 15
  40. 35

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