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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 390 · 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 6 and their LCM is 432. One of the numbers is 48. What is the other number?
  2. 2.The HCF of two numbers is 5 and their LCM is 120. One of the numbers is 40. What is the other number?
  3. 3.Find the LCM of 15 and 12.
  4. 4.What is the smallest number you must add to 853 so that it divides exactly by 12?
  5. 5.What is the smallest number you must take away from 170 so that it divides exactly by 11?
  6. 6.What is 60% of 355?
  7. 7.Find the HCF of 10 and 6.
  8. 8.The HCF of two numbers is 6 and their LCM is 252. One of the numbers is 36. What is the other number?
  9. 9.How many factors does 13 have?
  10. 10.2.9 × 3 =
  11. 11.Divide ₹328 between Saanvi and Priya in the ratio 3 : 5. How much does Saanvi get (in ₹)?
  12. 12.Find the third proportional to 7 and 21 (that is, 7 : 21 = 21 : ?).
  13. 13.Which of these numbers divides exactly by 3? (a) 9551 (b) 2085 (c) 8777 (d) 1046
  14. 14.6/10 + 6/11 =
  15. 15.How many factors does 36 have?
  16. 16.1/5 × 4/8 =
  17. 17.12 : 7 = 36 : ?
  18. 18.7 × (19 − 16) + 12 ÷ 2 =
  19. 19.If 3 kg of rice costs ₹72, how many kg can you buy for ₹96?
  20. 20.Find the LCM of 6, 12 and 13.
  21. 21.Which is closest to 800 × 89? (Round each number first.) (a) 144000 (b) 72000 (c) 7200 (d) 720000
  22. 22.Three temple bells ring every 6, 20 and 5 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  23. 23.Round 36.13 to one decimal place. =
  24. 24.The ratio of boys to girls in a class is 1 : 8. There are 8 boys. How many girls are there?
  25. 25.What is the smallest number you must add to 106 so that it divides exactly by 7?
  26. 26.27 + 12 × 5 − 10 =
  27. 27.Round 96246 to the nearest hundred.
  28. 28.Two tanks hold 350 litres and 200 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  29. 29.Karan scored 7 marks out of 25 in a test. What percentage did Karan score?
  30. 30.2 : 13 = 4 : ?
  31. 31.What is the smallest number you must add to 632 so that it divides exactly by 9?
  32. 32.A hall floor is 90 cm long and 60 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  33. 33.40% of a number is 236. What is the number?
  34. 34.Which is closest to 296 × 60? (Round each number first.) (a) 18000 (b) 180000 (c) 36000 (d) 1800
  35. 35.Three temple bells ring every 4, 20 and 12 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  36. 36.6/12 + 2/7 =
  37. 37.If 3 cricket balls cost ₹174, how much do 5 cricket balls cost (in ₹)?
  38. 38.What is 30% of 170?
  39. 39.5% of a number is 2. What is the number?
  40. 40.Which is closest to 296 + 197 + 196? (a) 700 (b) 900 (c) 600 (d) 800

Answer key

  1. 54
  2. 15
  3. 60
  4. 11
  5. 5
  6. 213
  7. 2
  8. 42
  9. 2
  10. 8.7
  11. 123
  12. 63
  13. 2085
  14. 63/55
  15. 9
  16. 1/10
  17. 21
  18. 27
  19. 4
  20. 156
  21. 72000
  22. 60
  23. 36.1
  24. 64
  25. 6
  26. 77
  27. 96200
  28. 50
  29. 28
  30. 26
  31. 7
  32. 6
  33. 590
  34. 18000
  35. 60
  36. 11/14
  37. 290
  38. 51
  39. 40
  40. 700

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