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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 832 · 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.Find the LCM of 5, 3 and 12.
  2. 2.Kavya takes 40 seconds and Aditya takes 90 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?
  3. 3.Three temple bells ring every 30, 5 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  4. 4.4/12 × 1/2 =
  5. 5.Find the HCF of 36 and 27.
  6. 6.59 − 25 ÷ 5 × 7 =
  7. 7.The HCF of two numbers is 7 and their LCM is 392. One of the numbers is 56. What is the other number?
  8. 8.Which of these numbers divides exactly by 9? (a) 8884 (b) 5753 (c) 8370 (d) 7946
  9. 9.8 : 6 = 48 : ?
  10. 10.Write 11/50 as a percent.
  11. 11.The HCF of two numbers is 8 and their LCM is 288. One of the numbers is 32. What is the other number?
  12. 12.7 : 6 = 21 : ?
  13. 13.Two tanks hold 80 litres and 360 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  14. 14.How many factors does 65 have?
  15. 15.What is 30% of 320?
  16. 16.Vivaan takes 72 seconds and Zoya takes 80 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?
  17. 17.2/5 + 1/2 =
  18. 18.Which is closest to 599 ÷ 29? (a) 40 (b) 10 (c) 200 (d) 20
  19. 19.Find the smallest number bigger than 15 that leaves a remainder of 4 when divided by 10, 15 or 5.
  20. 20.Find the smallest number bigger than 5 that leaves a remainder of 2 when divided by 4, 3 or 5.
  21. 21.1/6 of 72 + 9 × 9 =
  22. 22.Two tanks hold 210 litres and 120 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  23. 23.Find the HCF of 72 and 40.
  24. 24.What is the smallest number you must add to 541 so that it divides exactly by 9?
  25. 25.1/2 of 16 + 4 × 3 =
  26. 26.9 × (10 − 7) + 32 ÷ 8 =
  27. 27.Three temple bells ring every 8, 20 and 4 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  28. 28.1/2 + 1/5 =
  29. 29.The ratio of boys to girls in a class is 8 : 7. There are 24 boys. How many girls are there?
  30. 30.Round 29.26 to one decimal place. =
  31. 31.A car goes 115 km on 5 litres of petrol. How far can it go on 26 litres (in km)?
  32. 32.3 : 6 = 24 : ?
  33. 33.Find the third proportional to 9 and 36 (that is, 9 : 36 = 36 : ?).
  34. 34.(16 + 17) × 2 − 9 =
  35. 35.A car goes 50 km on 5 litres of petrol. How far can it go on 8 litres (in km)?
  36. 36.6/8 + 1/3 =
  37. 37.What is the smallest number you must add to 115 so that it divides exactly by 4?
  38. 38.Find the smallest number bigger than 12 that leaves a remainder of 3 when divided by 6, 5 or 12.
  39. 39.Find the HCF of 24 and 32.
  40. 40.45 ÷ 5 × 3 + 17 =

Answer key

  1. 60
  2. 360
  3. 120
  4. 1/6
  5. 9
  6. 24
  7. 49
  8. 8370
  9. 36
  10. 22
  11. 72
  12. 18
  13. 40
  14. 4
  15. 96
  16. 720
  17. 9/10
  18. 20
  19. 34
  20. 62
  21. 93
  22. 30
  23. 8
  24. 8
  25. 20
  26. 31
  27. 40
  28. 7/10
  29. 21
  30. 29.3
  31. 598
  32. 48
  33. 144
  34. 57
  35. 80
  36. 13/12
  37. 1
  38. 63
  39. 8
  40. 44

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