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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 625 · 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.The HCF of two numbers is 2 and their LCM is 36. One of the numbers is 18. What is the other number?
  2. 2.6 × (29 − 15) + 18 ÷ 3 =
  3. 3.What is 15% of 40?
  4. 4.1/5 × 3/9 =
  5. 5.Which of these numbers divides exactly by 4? (a) 6181 (b) 5477 (c) 7238 (d) 5264
  6. 6.40 ÷ 5 × 6 + 29 =
  7. 7.1/2 × 5/10 =
  8. 8.If 4 mangoes cost ₹160, how much do 3 mangoes cost (in ₹)?
  9. 9.Find the smallest number bigger than 10 that leaves a remainder of 1 when divided by 10, 3 or 5.
  10. 10.What is the smallest number you must take away from 788 so that it divides exactly by 3?
  11. 11.10% of a number is 55. What is the number?
  12. 12.Two tanks hold 125 litres and 100 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  13. 13.Round 41.77 to one decimal place. =
  14. 14.Find the LCM of 18 and 15.
  15. 15.3 : 15 = 21 : ?
  16. 16.Three temple bells ring every 30, 24 and 12 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  17. 17.4.53 + 8.8 =
  18. 18.How many factors does 38 have?
  19. 19.Find the smallest number bigger than 15 that leaves a remainder of 1 when divided by 15, 10 or 5.
  20. 20.How many factors does 23 have?
  21. 21.Find the smallest number bigger than 12 that leaves a remainder of 5 when divided by 9, 12 or 6.
  22. 22.Which is closest to 696 + 598 + 98? (a) 1500 (b) 1400 (c) 1300 (d) 1600
  23. 23.Find the LCM of 15 and 27.
  24. 24.Find the LCM of 21 and 24.
  25. 25.2/4 + 2/11 =
  26. 26.Which is closest to 301 × 21? (Round each number first.) (a) 12000 (b) 600 (c) 6000 (d) 60000
  27. 27.What is 1/3 of 75 litres?
  28. 28.Find the LCM of 14, 8 and 7.
  29. 29.2 painters can paint a school in 19 days. How many days would 19 painters take, working at the same speed?
  30. 30.What is the smallest number you must take away from 726 so that it divides exactly by 4?
  31. 31.Find the third proportional to 4 and 8 (that is, 4 : 8 = 8 : ?).
  32. 32.A car goes 112 km on 8 litres of petrol. How far can it go on 14 litres (in km)?
  33. 33.8/12 + 2/7 =
  34. 34.10 : 2 = 60 : ?
  35. 35.Round 62.08 to one decimal place. =
  36. 36.Ishaan takes 30 seconds and Dev takes 72 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?
  37. 37.30 − 45 ÷ 9 × 4 =
  38. 38.64.4 ÷ 7 =
  39. 39.Which of these numbers divides exactly by 11? (a) 4704 (b) 8140 (c) 1890 (d) 6882
  40. 40.Three temple bells ring every 12, 6 and 15 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?

Answer key

  1. 4
  2. 90
  3. 6
  4. 1/15
  5. 5264
  6. 77
  7. 1/4
  8. 120
  9. 31
  10. 2
  11. 550
  12. 25
  13. 41.8
  14. 90
  15. 105
  16. 120
  17. 13.33
  18. 4
  19. 31
  20. 2
  21. 41
  22. 1400
  23. 135
  24. 168
  25. 15/22
  26. 6000
  27. 25
  28. 56
  29. 2
  30. 2
  31. 16
  32. 196
  33. 20/21
  34. 12
  35. 62.1
  36. 360
  37. 10
  38. 9.2
  39. 8140
  40. 60

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