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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 387 · 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. 1.6/7 − 3/8 =
  2. 2.What is the smallest number you must add to 309 so that it divides exactly by 4?
  3. 3.50% of a number is 282. What is the number?
  4. 4.8.44 + 2.5 =
  5. 5.The HCF of two numbers is 5 and their LCM is 280. One of the numbers is 40. What is the other number?
  6. 6.What is the smallest number you must take away from 178 so that it divides exactly by 13?
  7. 7.Three temple bells ring every 9, 15 and 30 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  8. 8.The HCF of two numbers is 3 and their LCM is 36. One of the numbers is 12. What is the other number?
  9. 9.(13 + 18) × 6 − 28 =
  10. 10.What percent of 400 is 64?
  11. 11.9 : 7 = 72 : ?
  12. 12.Which is closest to 804 × 68? (Round each number first.) (a) 5600 (b) 56000 (c) 560000 (d) 112000
  13. 13.Round 19219 to the nearest ten.
  14. 14.How many factors does 45 have?
  15. 15.What is 2/3 of ₹69?
  16. 16.What is the smallest number you must add to 610 so that it divides exactly by 4?
  17. 17.What is the smallest number you must take away from 881 so that it divides exactly by 9?
  18. 18.2 painters can paint a school in 16 days. How many days would 8 painters take, working at the same speed?
  19. 19.3/5 of 55 + 4 × 8 =
  20. 20.50 − 27 ÷ 9 × 4 =
  21. 21.10.4 ÷ 4 =
  22. 22.Write 21/50 as a percent.
  23. 23.(4 + 14) × 3 − 6 =
  24. 24.3/7 + 1/6 =
  25. 25.How many factors does 13 have?
  26. 26.Which is closest to 397 ÷ 19? (a) 10 (b) 200 (c) 40 (d) 20
  27. 27.What is the smallest number you must take away from 986 so that it divides exactly by 6?
  28. 28.5/10 − 1/9 =
  29. 29.What is 80% of 15?
  30. 30.Find the LCM of 32 and 36.
  31. 31.The ratio of boys to girls in a class is 6 : 1. There are 54 boys. How many girls are there?
  32. 32.11 painters can paint a school in 21 days. How many days would 7 painters take, working at the same speed?
  33. 33.If 4 notebooks cost ₹124, how much do 6 notebooks cost (in ₹)?
  34. 34.The HCF of two numbers is 2 and their LCM is 12. One of the numbers is 4. What is the other number?
  35. 35.50 + 5 × 7 − 35 =
  36. 36.Two tanks hold 90 litres and 120 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  37. 37.5% of a number is 29. What is the number?
  38. 38.Find the LCM of 35 and 20.
  39. 39.8.3 × 6 =
  40. 40.6.75 + 6.8 =

Answer key

  1. 27/56
  2. 3
  3. 564
  4. 10.94
  5. 35
  6. 9
  7. 90
  8. 9
  9. 158
  10. 16
  11. 56
  12. 56000
  13. 19220
  14. 6
  15. 46
  16. 2
  17. 8
  18. 4
  19. 65
  20. 38
  21. 2.6
  22. 42
  23. 48
  24. 25/42
  25. 2
  26. 20
  27. 2
  28. 7/18
  29. 12
  30. 288
  31. 9
  32. 33
  33. 186
  34. 6
  35. 50
  36. 30
  37. 580
  38. 140
  39. 49.8
  40. 13.55

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