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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 678 · 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 4 and 9.
  2. 2.Three temple bells ring every 6, 8 and 12 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  3. 3.What is 15% of 340?
  4. 4.Find the third proportional to 6 and 24 (that is, 6 : 24 = 24 : ?).
  5. 5.A hostel has enough food for 12 students for 18 days. How many days will the same food last for 8 students?
  6. 6.Find the LCM of 16 and 18.
  7. 7.22 + 12 × 7 − 3 =
  8. 8.8/9 of 18 + 4 × 7 =
  9. 9.What is the smallest number you must add to 248 so that it divides exactly by 11?
  10. 10.Divide ₹156 between Aditya and Kavya in the ratio 7 : 5. How much does Aditya get (in ₹)?
  11. 11.The ratio of boys to girls in a class is 8 : 7. There are 16 boys. How many girls are there?
  12. 12.Which is closest to 197 + 599 + 203? (a) 1100 (b) 900 (c) 1200 (d) 1000
  13. 13.If 5 erasers cost ₹155, how much do 19 erasers cost (in ₹)?
  14. 14.32.9 ÷ 7 =
  15. 15.The ratio of boys to girls in a class is 4 : 7. There are 20 boys. How many girls are there?
  16. 16.1/10 + 1/4 =
  17. 17.Three temple bells ring every 15, 4 and 12 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  18. 18.2 : 11 = 10 : ?
  19. 19.What percent of 80 is 64?
  20. 20.How many factors does 42 have?
  21. 21.Find the LCM of 54 and 48.
  22. 22.Two tanks hold 25 litres and 15 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  23. 23.How many factors does 43 have?
  24. 24.Find the LCM of 4 and 18.
  25. 25.10% of a number is 23. What is the number?
  26. 26.Find the third proportional to 8 and 40 (that is, 8 : 40 = 40 : ?).
  27. 27.Round 51169 to the nearest ten.
  28. 28.49 − 24 ÷ 3 × 6 =
  29. 29.What is the smallest number you must add to 494 so that it divides exactly by 6?
  30. 30.73 − 10 ÷ 2 × 8 =
  31. 31.A hostel has enough food for 10 students for 6 days. How many days will the same food last for 12 students?
  32. 32.What percent of 20 is 18?
  33. 33.If 4 kg of rice costs ₹284, how many kg can you buy for ₹355?
  34. 34.The ratio of boys to girls in a class is 9 : 8. There are 27 boys. How many girls are there?
  35. 35.Three temple bells ring every 8, 12 and 4 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  36. 36.4 ÷ 2 × 8 + 15 =
  37. 37.The HCF of two numbers is 2 and their LCM is 80. One of the numbers is 10. What is the other number?
  38. 38.If 12 cricket balls cost ₹324, how much do 18 cricket balls cost (in ₹)?
  39. 39.Find the HCF of 54 and 48.
  40. 40.Write 1/2 as a percent.

Answer key

  1. 36
  2. 24
  3. 51
  4. 96
  5. 27
  6. 144
  7. 103
  8. 44
  9. 5
  10. 91
  11. 14
  12. 1000
  13. 589
  14. 4.7
  15. 35
  16. 7/20
  17. 60
  18. 55
  19. 80
  20. 8
  21. 432
  22. 5
  23. 2
  24. 36
  25. 230
  26. 200
  27. 51170
  28. 1
  29. 4
  30. 33
  31. 5
  32. 90
  33. 5
  34. 24
  35. 24
  36. 31
  37. 16
  38. 486
  39. 6
  40. 50

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