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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 477 · 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.Aarav takes 45 seconds and Tara 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?
  2. 2.30 + 2 × 4 − 27 =
  3. 3.What is the smallest number you must add to 712 so that it divides exactly by 11?
  4. 4.Divide ₹363 between Ishaan and Aarav in the ratio 9 : 2. How much does Aarav get (in ₹)?
  5. 5.Round 67169 to the nearest ten.
  6. 6.Which is closest to 1508 ÷ 49? (a) 15 (b) 30 (c) 300 (d) 60
  7. 7.What is the smallest number you must take away from 892 so that it divides exactly by 8?
  8. 8.The HCF of two numbers is 2 and their LCM is 40. One of the numbers is 10. What is the other number?
  9. 9.Two tanks hold 30 litres and 45 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  10. 10.What percent of 400 is 52?
  11. 11.Find the LCM of 30 and 36.
  12. 12.How many factors does 43 have?
  13. 13.Find the LCM of 45 and 35.
  14. 14.The HCF of two numbers is 7 and their LCM is 70. One of the numbers is 14. What is the other number?
  15. 15.Which is closest to 1196 ÷ 31? (a) 80 (b) 40 (c) 400 (d) 20
  16. 16.Find the LCM of 3, 9 and 7.
  17. 17.(3 + 11) × 4 − 16 =
  18. 18.Divide ₹312 between Aditya and Meera in the ratio 9 : 4. How much does Aditya get (in ₹)?
  19. 19.33 + 8 × 3 − 4 =
  20. 20.20% of a number is 88. What is the number?
  21. 21.How many factors does 28 have?
  22. 22.2/3 + 8/10 =
  23. 23.How many factors does 83 have?
  24. 24.3/8 + 2/6 =
  25. 25.A car goes 90 km on 10 litres of petrol. How far can it go on 28 litres (in km)?
  26. 26.Three temple bells ring every 5, 10 and 6 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  27. 27.A car goes 150 km on 6 litres of petrol. How far can it go on 34 litres (in km)?
  28. 28.Find the HCF of 10 and 15.
  29. 29.If 3 bottles of juice cost ₹165, how much do 4 bottles of juice cost (in ₹)?
  30. 30.Find the smallest number bigger than 9 that leaves a remainder of 2 when divided by 8, 9 or 3.
  31. 31.Find the HCF of 26 and 117.
  32. 32.Two tanks hold 150 litres and 350 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  33. 33.What percent of 200 is 48?
  34. 34.A hall floor is 280 cm long and 120 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  35. 35.Which is closest to 596 × 68? (Round each number first.) (a) 42000 (b) 4200 (c) 420000 (d) 84000
  36. 36.The HCF of two numbers is 5 and their LCM is 315. One of the numbers is 35. What is the other number?
  37. 37.If 3 erasers cost ₹168, how much do 14 erasers cost (in ₹)?
  38. 38.What is 1/9 of 261 km?
  39. 39.Write 6/25 as a percent.
  40. 40.Find the HCF of 12 and 18.

Answer key

  1. 360
  2. 11
  3. 3
  4. 66
  5. 67170
  6. 30
  7. 4
  8. 8
  9. 15
  10. 13
  11. 180
  12. 2
  13. 315
  14. 35
  15. 40
  16. 63
  17. 40
  18. 216
  19. 53
  20. 440
  21. 6
  22. 22/15
  23. 2
  24. 17/24
  25. 252
  26. 30
  27. 850
  28. 5
  29. 220
  30. 74
  31. 13
  32. 50
  33. 24
  34. 21
  35. 42000
  36. 45
  37. 784
  38. 29
  39. 24
  40. 6

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