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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 343 · 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.A hall floor is 250 cm long and 200 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  2. 2.Write 11/20 as a percent.
  3. 3.How many factors does 21 have?
  4. 4.Nisha takes 48 seconds and Vivaan takes 54 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?
  5. 5.How many factors does 55 have?
  6. 6.Find the third proportional to 2 and 6 (that is, 2 : 6 = 6 : ?).
  7. 7.6 ÷ 3 × 6 + 5 =
  8. 8.15.2 ÷ 2 =
  9. 9.A hall floor is 250 cm long and 150 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  10. 10.The ratio of boys to girls in a class is 5 : 2. There are 45 boys. How many girls are there?
  11. 11.12% of a number is 60. What is the number?
  12. 12.45 ÷ 5 × 8 + 9 =
  13. 13.The HCF of two numbers is 2 and their LCM is 42. One of the numbers is 6. What is the other number?
  14. 14.What is 10% of 190?
  15. 15.What is 60% of 260?
  16. 16.Round 30.92 to one decimal place. =
  17. 17.Which is closest to 2705 ÷ 29? (a) 45 (b) 900 (c) 90 (d) 180
  18. 18.A car goes 40 km on 5 litres of petrol. How far can it go on 8 litres (in km)?
  19. 19.Vivaan takes 50 seconds and Priya takes 40 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?
  20. 20.Two tanks hold 40 litres and 140 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  21. 21.A car goes 44 km on 2 litres of petrol. How far can it go on 30 litres (in km)?
  22. 22.31 + 9 × 4 − 8 =
  23. 23.Find the third proportional to 8 and 40 (that is, 8 : 40 = 40 : ?).
  24. 24.The HCF of two numbers is 8 and their LCM is 576. One of the numbers is 72. What is the other number?
  25. 25.32 − 24 ÷ 8 × 5 =
  26. 26.The HCF of two numbers is 7 and their LCM is 147. One of the numbers is 49. What is the other number?
  27. 27.15 + 11 × 6 − 3 =
  28. 28.What is the smallest number you must take away from 190 so that it divides exactly by 7?
  29. 29.Two tanks hold 80 litres and 120 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  30. 30.Find the third proportional to 6 and 24 (that is, 6 : 24 = 24 : ?).
  31. 31.Three temple bells ring every 24, 18 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  32. 32.What is the smallest number you must take away from 955 so that it divides exactly by 11?
  33. 33.10% of a number is 1. What is the number?
  34. 34.1/9 of 45 + 5 × 2 =
  35. 35.47 − 12 ÷ 2 × 6 =
  36. 36.If 3 cricket balls cost ₹27, how much do 14 cricket balls cost (in ₹)?
  37. 37.Find the third proportional to 4 and 20 (that is, 4 : 20 = 20 : ?).
  38. 38.Find the smallest number bigger than 15 that leaves a remainder of 2 when divided by 6, 15 or 5.
  39. 39.64 − 64 ÷ 8 × 4 =
  40. 40.If 4 kg of rice costs ₹308, how many kg can you buy for ₹539?

Answer key

  1. 20
  2. 55
  3. 4
  4. 432
  5. 4
  6. 18
  7. 17
  8. 7.6
  9. 15
  10. 18
  11. 500
  12. 81
  13. 14
  14. 19
  15. 156
  16. 30.9
  17. 90
  18. 64
  19. 200
  20. 20
  21. 660
  22. 59
  23. 200
  24. 64
  25. 17
  26. 21
  27. 78
  28. 1
  29. 40
  30. 96
  31. 72
  32. 9
  33. 10
  34. 15
  35. 11
  36. 126
  37. 100
  38. 32
  39. 32
  40. 7

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