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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 10 · 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 21 and 15.
  2. 2.27 + 6 × 5 − 8 =
  3. 3.Which is closest to 303 × 31? (Round each number first.) (a) 18000 (b) 900 (c) 90000 (d) 9000
  4. 4.What is the smallest number you must add to 763 so that it divides exactly by 4?
  5. 5.Which is closest to 398 × 21? (Round each number first.) (a) 800 (b) 16000 (c) 8000 (d) 80000
  6. 6.The HCF of two numbers is 2 and their LCM is 24. One of the numbers is 6. What is the other number?
  7. 7.Find the third proportional to 8 and 32 (that is, 8 : 32 = 32 : ?).
  8. 8.Which is closest to 397 + 295 + 302? (a) 1000 (b) 900 (c) 1200 (d) 1100
  9. 9.Find the LCM of 13, 4 and 12.
  10. 10.Zoya takes 40 seconds and Farhan takes 72 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?
  11. 11.How many factors does 80 have?
  12. 12.Round 74732 to the nearest ten.
  13. 13.Two tanks hold 180 litres and 225 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  14. 14.Which of these numbers divides exactly by 11? (a) 1712 (b) 7409 (c) 8319 (d) 1265
  15. 15.60 ÷ 6 × 6 + 8 =
  16. 16.What is the smallest number you must take away from 918 so that it divides exactly by 13?
  17. 17.If 3 erasers cost ₹135, how much do 15 erasers cost (in ₹)?
  18. 18.Find the LCM of 15, 3 and 8.
  19. 19.What is the smallest number you must take away from 992 so that it divides exactly by 3?
  20. 20.Find the LCM of 42 and 30.
  21. 21.The ratio of boys to girls in a class is 7 : 5. There are 28 boys. How many girls are there?
  22. 22.What percent of 50 is 45?
  23. 23.Round 62.57 to one decimal place. =
  24. 24.Which is closest to 2707 ÷ 29? (a) 90 (b) 900 (c) 45 (d) 180
  25. 25.A car goes 120 km on 5 litres of petrol. How far can it go on 10 litres (in km)?
  26. 26.6.2 ÷ 2 =
  27. 27.Which is closest to 704 × 62? (Round each number first.) (a) 420000 (b) 84000 (c) 42000 (d) 4200
  28. 28.Find the LCM of 4, 10 and 5.
  29. 29.Find the LCM of 25 and 20.
  30. 30.What percent of 40 is 2?
  31. 31.3/5 × 1/11 =
  32. 32.Divide ₹539 between Dev and Sneha in the ratio 3 : 8. How much does Sneha get (in ₹)?
  33. 33.14.8 ÷ 4 =
  34. 34.55 − 24 ÷ 4 × 9 =
  35. 35.Which is closest to 803 + 296 + 204? (a) 1500 (b) 1200 (c) 1400 (d) 1300
  36. 36.Find the HCF of 48 and 36.
  37. 37.Meera scored 68 marks out of 80 in a test. What percentage did Meera score?
  38. 38.Round 59087 to the nearest ten.
  39. 39.Three temple bells ring every 20, 8 and 15 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  40. 40.The ratio of boys to girls in a class is 3 : 8. There are 9 boys. How many girls are there?

Answer key

  1. 105
  2. 49
  3. 9000
  4. 1
  5. 8000
  6. 8
  7. 128
  8. 1000
  9. 156
  10. 360
  11. 10
  12. 74730
  13. 45
  14. 1265
  15. 68
  16. 8
  17. 675
  18. 120
  19. 2
  20. 210
  21. 20
  22. 90
  23. 62.6
  24. 90
  25. 240
  26. 3.1
  27. 42000
  28. 20
  29. 100
  30. 5
  31. 3/55
  32. 392
  33. 3.7
  34. 1
  35. 1300
  36. 12
  37. 85
  38. 59090
  39. 120
  40. 24

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