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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 7 · 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.Three temple bells ring every 18, 12 and 9 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  2. 2.40 ÷ 4 × 5 + 8 =
  3. 3.Which of these numbers divides exactly by 3? (a) 4186 (b) 3167 (c) 5694 (d) 9824
  4. 4.How many factors does 58 have?
  5. 5.Three temple bells ring every 10, 6 and 18 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  6. 6.Three temple bells ring every 9, 30 and 18 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  7. 7.Which is closest to 899 × 78? (Round each number first.) (a) 144000 (b) 720000 (c) 7200 (d) 72000
  8. 8.Round 55536 to the nearest ten.
  9. 9.What is the smallest number you must take away from 914 so that it divides exactly by 4?
  10. 10.Kabir scored 12 marks out of 25 in a test. What percentage did Kabir score?
  11. 11.A car goes 108 km on 12 litres of petrol. How far can it go on 20 litres (in km)?
  12. 12.Two tanks hold 120 litres and 210 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  13. 13.Find the third proportional to 2 and 8 (that is, 2 : 8 = 8 : ?).
  14. 14.Which is closest to 994 ÷ 21? (a) 25 (b) 50 (c) 100 (d) 500
  15. 15.Find the LCM of 8 and 5.
  16. 16.Which of these numbers divides exactly by 6? (a) 8617 (b) 9072 (c) 9256 (d) 9022
  17. 17.45 + 7 × 10 − 45 =
  18. 18.A car goes 69 km on 3 litres of petrol. How far can it go on 25 litres (in km)?
  19. 19.Round 49.84 to one decimal place. =
  20. 20.(14 + 11) × 7 − 11 =
  21. 21.Find the third proportional to 4 and 20 (that is, 4 : 20 = 20 : ?).
  22. 22.Find the smallest number bigger than 8 that leaves a remainder of 2 when divided by 6, 3 or 8.
  23. 23.Nisha takes 40 seconds and Farhan takes 50 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?
  24. 24.Round 14119 to the nearest ten.
  25. 25.9 : 11 = 36 : ?
  26. 26.Find the HCF of 60 and 135.
  27. 27.The HCF of two numbers is 2 and their LCM is 56. One of the numbers is 8. What is the other number?
  28. 28.Find the third proportional to 3 and 9 (that is, 3 : 9 = 9 : ?).
  29. 29.Sneha scored 48 marks out of 80 in a test. What percentage did Sneha score?
  30. 30.Which is closest to 898 × 31? (Round each number first.) (a) 270000 (b) 54000 (c) 27000 (d) 2700
  31. 31.12 painters can paint a school in 6 days. How many days would 8 painters take, working at the same speed?
  32. 32.8 painters can paint a school in 28 days. How many days would 16 painters take, working at the same speed?
  33. 33.24 ÷ 8 × 4 + 22 =
  34. 34.47 − 10 ÷ 5 × 6 =
  35. 35.Find the LCM of 9, 10 and 6.
  36. 36.Find the third proportional to 8 and 16 (that is, 8 : 16 = 16 : ?).
  37. 37.Which is closest to 297 + 401 + 204? (a) 1000 (b) 1100 (c) 800 (d) 900
  38. 38.How many factors does 85 have?
  39. 39.12% of a number is 24. What is the number?
  40. 40.What is the smallest number you must take away from 257 so that it divides exactly by 6?

Answer key

  1. 36
  2. 58
  3. 5694
  4. 4
  5. 90
  6. 90
  7. 72000
  8. 55540
  9. 2
  10. 48
  11. 180
  12. 30
  13. 32
  14. 50
  15. 40
  16. 9072
  17. 70
  18. 575
  19. 49.8
  20. 164
  21. 100
  22. 26
  23. 200
  24. 14120
  25. 44
  26. 15
  27. 14
  28. 27
  29. 60
  30. 27000
  31. 9
  32. 14
  33. 34
  34. 35
  35. 90
  36. 32
  37. 900
  38. 4
  39. 200
  40. 5

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