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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 421 · 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 add to 386 so that it divides exactly by 9?
  2. 2.(19 + 6) × 7 − 29 =
  3. 3.A car goes 54 km on 3 litres of petrol. How far can it go on 36 litres (in km)?
  4. 4.Which is closest to 2491 ÷ 51? (a) 500 (b) 100 (c) 25 (d) 50
  5. 5.5/7 + 3/4 =
  6. 6.What is 10% of 570?
  7. 7.Two tanks hold 50 litres and 60 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  8. 8.How many factors does 94 have?
  9. 9.What is the smallest number you must take away from 219 so that it divides exactly by 9?
  10. 10.9 × (15 − 6) + 54 ÷ 9 =
  11. 11.Which is closest to 2695 ÷ 31? (a) 180 (b) 45 (c) 90 (d) 900
  12. 12.Which is closest to 897 × 82? (Round each number first.) (a) 144000 (b) 7200 (c) 720000 (d) 72000
  13. 13.Find the smallest number bigger than 12 that leaves a remainder of 3 when divided by 12, 8 or 4.
  14. 14.What percent of 50 is 11?
  15. 15.The HCF of two numbers is 9 and their LCM is 405. One of the numbers is 45. What is the other number?
  16. 16.What is the smallest number you must add to 909 so that it divides exactly by 7?
  17. 17.5% of a number is 23. What is the number?
  18. 18.7 : 3 = 28 : ?
  19. 19.Which is closest to 202 × 38? (Round each number first.) (a) 800 (b) 8000 (c) 16000 (d) 80000
  20. 20.Which is closest to 1396 ÷ 21? (a) 140 (b) 35 (c) 700 (d) 70
  21. 21.2 × (17 − 2) + 21 ÷ 3 =
  22. 22.Round 17760 to the nearest hundred.
  23. 23.What is the smallest number you must add to 153 so that it divides exactly by 12?
  24. 24.If 9 kg of rice costs ₹540, how many kg can you buy for ₹120?
  25. 25.Which of these numbers divides exactly by 6? (a) 6537 (b) 3228 (c) 5014 (d) 4412
  26. 26.Find the HCF of 49 and 35.
  27. 27.12 : 11 = 108 : ?
  28. 28.2/4 − 2/6 =
  29. 29.What is the smallest number you must add to 607 so that it divides exactly by 11?
  30. 30.Find the LCM of 28 and 36.
  31. 31.Vivaan takes 45 seconds and Pooja takes 30 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?
  32. 32.What is the smallest number you must add to 158 so that it divides exactly by 12?
  33. 33.Divide ₹432 between Pooja and Priya in the ratio 7 : 2. How much does Priya get (in ₹)?
  34. 34.What is the smallest number you must add to 305 so that it divides exactly by 6?
  35. 35.How many factors does 27 have?
  36. 36.What percent of 500 is 55?
  37. 37.10 painters can paint a school in 15 days. How many days would 3 painters take, working at the same speed?
  38. 38.Two tanks hold 140 litres and 180 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  39. 39.How many factors does 38 have?
  40. 40.55 − 56 ÷ 7 × 6 =

Answer key

  1. 1
  2. 146
  3. 648
  4. 50
  5. 41/28
  6. 57
  7. 10
  8. 4
  9. 3
  10. 87
  11. 90
  12. 72000
  13. 27
  14. 22
  15. 81
  16. 1
  17. 460
  18. 12
  19. 8000
  20. 70
  21. 37
  22. 17800
  23. 3
  24. 2
  25. 3228
  26. 7
  27. 99
  28. 1/6
  29. 9
  30. 252
  31. 90
  32. 10
  33. 96
  34. 1
  35. 4
  36. 11
  37. 50
  38. 20
  39. 4
  40. 7

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