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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 407 · 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. 1.7.93 + 1.5 =
  2. 2.Which of these numbers divides exactly by 3? (a) 4869 (b) 7228 (c) 3391 (d) 4580
  3. 3.The HCF of two numbers is 7 and their LCM is 140. One of the numbers is 35. What is the other number?
  4. 4.Two tanks hold 175 litres and 150 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  5. 5.What is 120% of 525?
  6. 6.12 + 7 × 6 − 11 =
  7. 7.Three temple bells ring every 12, 30 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  8. 8.If 6 kg of rice costs ₹510, how many kg can you buy for ₹255?
  9. 9.7/12 + 1/2 =
  10. 10.Which of these numbers divides exactly by 11? (a) 8780 (b) 4621 (c) 1991 (d) 9641
  11. 11.Which of these numbers divides exactly by 6? (a) 3450 (b) 4561 (c) 7061 (d) 6826
  12. 12.A hall floor is 210 cm long and 60 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  13. 13.Two tanks hold 135 litres and 75 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  14. 14.Write 1/2 as a percent.
  15. 15.7/12 − 1/3 =
  16. 16.What percent of 20 is 14?
  17. 17.Find the HCF of 117 and 65.
  18. 18.How many factors does 17 have?
  19. 19.37 − 6 ÷ 2 × 5 =
  20. 20.1.78 + 5.6 =
  21. 21.Write 3/4 as a percent.
  22. 22.Find the LCM of 28 and 16.
  23. 23.1/2 of 8 + 2 × 4 =
  24. 24.Which of these numbers divides exactly by 4? (a) 2887 (b) 7305 (c) 9208 (d) 2186
  25. 25.39 + 7 × 4 − 21 =
  26. 26.What is 25% of 488?
  27. 27.2 × (17 − 12) + 96 ÷ 8 =
  28. 28.Find the HCF of 112 and 42.
  29. 29.What is 5/6 of ₹138?
  30. 30.If 9 notebooks cost ₹288, how much do 15 notebooks cost (in ₹)?
  31. 31.35 ÷ 5 × 6 + 17 =
  32. 32.(18 + 2) × 3 − 18 =
  33. 33.The HCF of two numbers is 4 and their LCM is 48. One of the numbers is 16. What is the other number?
  34. 34.Find the LCM of 3 and 8.
  35. 35.What is the smallest number you must take away from 554 so that it divides exactly by 13?
  36. 36.Find the LCM of 2 and 9.
  37. 37.The ratio of boys to girls in a class is 7 : 6. There are 63 boys. How many girls are there?
  38. 38.Find the third proportional to 7 and 14 (that is, 7 : 14 = 14 : ?).
  39. 39.What is 15% of 60?
  40. 40.Rahul takes 60 seconds and Pooja 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?

Answer key

  1. 9.43
  2. 4869
  3. 28
  4. 25
  5. 630
  6. 43
  7. 120
  8. 3
  9. 13/12
  10. 1991
  11. 3450
  12. 14
  13. 15
  14. 50
  15. 1/4
  16. 70
  17. 13
  18. 2
  19. 22
  20. 7.38
  21. 75
  22. 112
  23. 12
  24. 9208
  25. 46
  26. 122
  27. 22
  28. 14
  29. 115
  30. 480
  31. 59
  32. 42
  33. 12
  34. 24
  35. 8
  36. 18
  37. 54
  38. 28
  39. 9
  40. 300

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