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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 141 · 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.Write 1/4 as a percent.
  2. 2.4/6 − 1/12 =
  3. 3.49 ÷ 7 × 3 + 5 =
  4. 4.13 + 3 × 4 − 12 =
  5. 5.What is the smallest number you must add to 731 so that it divides exactly by 6?
  6. 6.2/5 + 1/2 =
  7. 7.10 : 3 = 70 : ?
  8. 8.Find the smallest number bigger than 12 that leaves a remainder of 1 when divided by 4, 12 or 6.
  9. 9.10% of a number is 19. What is the number?
  10. 10.The HCF of two numbers is 4 and their LCM is 84. One of the numbers is 12. What is the other number?
  11. 11.Which of these numbers divides exactly by 8? (a) 8114 (b) 9606 (c) 2645 (d) 4720
  12. 12.Rohan takes 30 seconds and Priya takes 50 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?
  13. 13.What is 3/8 of 216 litres?
  14. 14.Find the third proportional to 8 and 32 (that is, 8 : 32 = 32 : ?).
  15. 15.Three temple bells ring every 4, 24 and 30 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  16. 16.88 − 72 ÷ 9 × 9 =
  17. 17.Divide ₹102 between Tara and Diya in the ratio 1 : 5. How much does Tara get (in ₹)?
  18. 18.If 5 kg of rice costs ₹235, how many kg can you buy for ₹611?
  19. 19.5.71 + 6.5 =
  20. 20.Find the third proportional to 5 and 20 (that is, 5 : 20 = 20 : ?).
  21. 21.20 + 9 × 8 − 6 =
  22. 22.Write 1/10 as a percent.
  23. 23.Find the HCF of 56 and 126.
  24. 24.What is the smallest number you must add to 575 so that it divides exactly by 13?
  25. 25.A car goes 20 km on 2 litres of petrol. How far can it go on 35 litres (in km)?
  26. 26.Which is closest to 502 × 42? (Round each number first.) (a) 20000 (b) 40000 (c) 200000 (d) 2000
  27. 27.What is the smallest number you must take away from 839 so that it divides exactly by 6?
  28. 28.What is 40% of 90?
  29. 29.75% of a number is 297. What is the number?
  30. 30.Find the LCM of 4, 11 and 3.
  31. 31.Find the smallest number bigger than 12 that leaves a remainder of 4 when divided by 10, 12 or 6.
  32. 32.If 6 kg of rice costs ₹420, how many kg can you buy for ₹700?
  33. 33.The ratio of boys to girls in a class is 1 : 2. There are 5 boys. How many girls are there?
  34. 34.How many factors does 87 have?
  35. 35.What percent of 250 is 15?
  36. 36.25% of a number is 140. What is the number?
  37. 37.Three temple bells ring every 10, 5 and 18 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  38. 38.Round 36.79 to one decimal place. =
  39. 39.Pooja takes 54 seconds and Nisha 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?
  40. 40.Round 85571 to the nearest ten.

Answer key

  1. 25
  2. 7/12
  3. 26
  4. 13
  5. 1
  6. 9/10
  7. 21
  8. 13
  9. 190
  10. 28
  11. 4720
  12. 150
  13. 81
  14. 128
  15. 120
  16. 16
  17. 17
  18. 13
  19. 12.21
  20. 80
  21. 86
  22. 10
  23. 14
  24. 10
  25. 350
  26. 20000
  27. 5
  28. 36
  29. 396
  30. 132
  31. 64
  32. 10
  33. 10
  34. 4
  35. 6
  36. 560
  37. 90
  38. 36.8
  39. 432
  40. 85570

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