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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 335 · 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 15, 10 and 2.
  2. 2.Which of these numbers divides exactly by 3? (a) 3569 (b) 1294 (c) 9781 (d) 3819
  3. 3.Which is closest to 500 × 81? (Round each number first.) (a) 400000 (b) 40000 (c) 4000 (d) 80000
  4. 4.Find the LCM of 35 and 30.
  5. 5.Two tanks hold 15 litres and 40 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  6. 6.12 + 3 × 9 − 10 =
  7. 7.2/10 + 4/6 =
  8. 8.Find the HCF of 35 and 30.
  9. 9.6 painters can paint a school in 6 days. How many days would 18 painters take, working at the same speed?
  10. 10.9 painters can paint a school in 17 days. How many days would 17 painters take, working at the same speed?
  11. 11.9.51 + 3.2 =
  12. 12.A hostel has enough food for 9 students for 24 days. How many days will the same food last for 4 students?
  13. 13.9 × (27 − 24) + 12 ÷ 3 =
  14. 14.What is 3/5 of 40 students?
  15. 15.Three temple bells ring every 5, 8 and 24 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  16. 16.13 + 12 × 3 − 4 =
  17. 17.4 ÷ 2 × 7 + 14 =
  18. 18.Round 51172 to the nearest hundred.
  19. 19.Which is closest to 301 × 91? (Round each number first.) (a) 270000 (b) 2700 (c) 27000 (d) 54000
  20. 20.Write 3/25 as a percent.
  21. 21.3 × (26 − 6) + 8 ÷ 4 =
  22. 22.How many factors does 15 have?
  23. 23.Two tanks hold 75 litres and 135 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  24. 24.A car goes 230 km on 10 litres of petrol. How far can it go on 3 litres (in km)?
  25. 25.Two tanks hold 30 litres and 45 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  26. 26.Which of these numbers divides exactly by 3? (a) 2563 (b) 1977 (c) 5917 (d) 2203
  27. 27.Find the HCF of 44 and 33.
  28. 28.5/6 of 12 + 2 × 3 =
  29. 29.The HCF of two numbers is 3 and their LCM is 108. One of the numbers is 12. What is the other number?
  30. 30.Find the smallest number bigger than 12 that leaves a remainder of 1 when divided by 3, 12 or 10.
  31. 31.Find the LCM of 2, 15 and 12.
  32. 32.Find the third proportional to 4 and 8 (that is, 4 : 8 = 8 : ?).
  33. 33.The ratio of boys to girls in a class is 6 : 5. There are 54 boys. How many girls are there?
  34. 34.4 × (18 − 4) + 44 ÷ 4 =
  35. 35.How many factors does 33 have?
  36. 36.Which is closest to 97 + 200 + 304? (a) 600 (b) 700 (c) 800 (d) 500
  37. 37.If 8 kg of rice costs ₹504, how many kg can you buy for ₹882?
  38. 38.Which of these numbers divides exactly by 9? (a) 4334 (b) 1543 (c) 5385 (d) 7182
  39. 39.The ratio of boys to girls in a class is 9 : 4. There are 27 boys. How many girls are there?
  40. 40.Three temple bells ring every 18, 5 and 15 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?

Answer key

  1. 30
  2. 3819
  3. 40000
  4. 210
  5. 5
  6. 29
  7. 13/15
  8. 5
  9. 2
  10. 9
  11. 12.71
  12. 54
  13. 31
  14. 24
  15. 120
  16. 45
  17. 28
  18. 51200
  19. 27000
  20. 12
  21. 62
  22. 4
  23. 15
  24. 69
  25. 15
  26. 1977
  27. 11
  28. 16
  29. 27
  30. 61
  31. 60
  32. 16
  33. 45
  34. 67
  35. 4
  36. 600
  37. 14
  38. 7182
  39. 12
  40. 90

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