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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 941 · 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 12, 5 and 8.
  2. 2.Aarav takes 80 seconds and Priya takes 48 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?
  3. 3.4/5 of 50 + 3 × 6 =
  4. 4.5 : 2 = 10 : ?
  5. 5.Which is closest to 796 × 49? (Round each number first.) (a) 400000 (b) 80000 (c) 40000 (d) 4000
  6. 6.Find the LCM of 12, 5 and 6.
  7. 7.What is the smallest number you must add to 352 so that it divides exactly by 9?
  8. 8.Divide ₹220 between Rohan and Karan in the ratio 9 : 1. How much does Karan get (in ₹)?
  9. 9.What is the smallest number you must take away from 845 so that it divides exactly by 12?
  10. 10.What is the smallest number you must take away from 719 so that it divides exactly by 8?
  11. 11.9 : 4 = 45 : ?
  12. 12.Write 1/4 as a percent.
  13. 13.50 − 21 ÷ 3 × 5 =
  14. 14.If 3 pens cost ₹141, how much do 10 pens cost (in ₹)?
  15. 15.What is 150% of 430?
  16. 16.The ratio of boys to girls in a class is 3 : 2. There are 27 boys. How many girls are there?
  17. 17.Find the LCM of 6 and 10.
  18. 18.Two tanks hold 125 litres and 75 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  19. 19.9 : 8 = 18 : ?
  20. 20.The HCF of two numbers is 6 and their LCM is 72. One of the numbers is 18. What is the other number?
  21. 21.2/12 − 1/8 =
  22. 22.If 7 erasers cost ₹21, how much do 4 erasers cost (in ₹)?
  23. 23.Three temple bells ring every 5, 12 and 4 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  24. 24.1/6 + 1/8 =
  25. 25.A car goes 168 km on 7 litres of petrol. How far can it go on 3 litres (in km)?
  26. 26.The HCF of two numbers is 5 and their LCM is 30. One of the numbers is 15. What is the other number?
  27. 27.What is the smallest number you must take away from 677 so that it divides exactly by 4?
  28. 28.Find the LCM of 12, 7 and 2.
  29. 29.Find the HCF of 6 and 15.
  30. 30.2/7 + 1/3 =
  31. 31.Kavya takes 60 seconds and Ishaan 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?
  32. 32.Which is closest to 404 × 28? (Round each number first.) (a) 120000 (b) 24000 (c) 12000 (d) 1200
  33. 33.3.62 + 2.2 =
  34. 34.Find the smallest number bigger than 15 that leaves a remainder of 3 when divided by 6, 9 or 15.
  35. 35.A hall floor is 420 cm long and 120 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  36. 36.Find the third proportional to 5 and 10 (that is, 5 : 10 = 10 : ?).
  37. 37.2/12 × 3/7 =
  38. 38.How many factors does 48 have?
  39. 39.3/5 × 5/12 =
  40. 40.The HCF of two numbers is 5 and their LCM is 60. One of the numbers is 15. What is the other number?

Answer key

  1. 120
  2. 240
  3. 58
  4. 4
  5. 40000
  6. 60
  7. 8
  8. 22
  9. 5
  10. 7
  11. 20
  12. 25
  13. 15
  14. 470
  15. 645
  16. 18
  17. 30
  18. 25
  19. 16
  20. 24
  21. 1/24
  22. 12
  23. 60
  24. 7/24
  25. 72
  26. 10
  27. 1
  28. 84
  29. 3
  30. 13/21
  31. 540
  32. 12000
  33. 5.82
  34. 93
  35. 14
  36. 20
  37. 1/14
  38. 10
  39. 1/4
  40. 20

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