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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 205 · 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. 1.9 : 10 = 18 : ?
  2. 2.How many factors does 38 have?
  3. 3.What is 5% of 420?
  4. 4.Find the LCM of 9 and 21.
  5. 5.What is the smallest number you must take away from 632 so that it divides exactly by 3?
  6. 6.What is the smallest number you must take away from 914 so that it divides exactly by 12?
  7. 7.Tara takes 45 seconds and Kabir takes 36 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?
  8. 8.Find the LCM of 12 and 10.
  9. 9.Pooja scored 11 marks out of 50 in a test. What percentage did Pooja score?
  10. 10.Aarav takes 45 seconds and Priya 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.Divide ₹99 between Dev and Ananya in the ratio 5 : 4. How much does Dev get (in ₹)?
  12. 12.Round 83006 to the nearest ten.
  13. 13.What is 15% of 160?
  14. 14.Write 3/5 as a percent.
  15. 15.20 ÷ 2 × 3 + 3 =
  16. 16.16 ÷ 4 × 4 + 19 =
  17. 17.Which is closest to 400 + 796 + 96? (a) 1500 (b) 1200 (c) 1400 (d) 1300
  18. 18.Which is closest to 896 + 896 + 200? (a) 2200 (b) 2100 (c) 1900 (d) 2000
  19. 19.Which is closest to 897 + 797 + 898? (a) 2700 (b) 2500 (c) 2800 (d) 2600
  20. 20.1/4 × 1/5 =
  21. 21.Three temple bells ring every 30, 6 and 20 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  22. 22.Which of these numbers divides exactly by 9? (a) 8768 (b) 4848 (c) 2888 (d) 9837
  23. 23.Round 88642 to the nearest hundred.
  24. 24.Find the smallest number bigger than 9 that leaves a remainder of 2 when divided by 5, 3 or 9.
  25. 25.8/10 − 2/3 =
  26. 26.What is the smallest number you must add to 511 so that it divides exactly by 3?
  27. 27.A car goes 171 km on 9 litres of petrol. How far can it go on 20 litres (in km)?
  28. 28.Which of these numbers divides exactly by 11? (a) 8732 (b) 6655 (c) 5656 (d) 7363
  29. 29.A hall floor is 350 cm long and 100 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  30. 30.Find the LCM of 28 and 20.
  31. 31.59 − 16 ÷ 2 × 4 =
  32. 32.A hall floor is 150 cm long and 90 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  33. 33.Find the LCM of 10, 12 and 8.
  34. 34.15 ÷ 6 =
  35. 35.Divide ₹400 between Karan and Kabir in the ratio 5 : 3. How much does Karan get (in ₹)?
  36. 36.What is the smallest number you must take away from 176 so that it divides exactly by 9?
  37. 37.Find the third proportional to 8 and 24 (that is, 8 : 24 = 24 : ?).
  38. 38.2/5 of 15 + 8 × 5 =
  39. 39.What percent of 200 is 20?
  40. 40.The HCF of two numbers is 9 and their LCM is 270. One of the numbers is 45. What is the other number?

Answer key

  1. 20
  2. 4
  3. 21
  4. 63
  5. 2
  6. 2
  7. 180
  8. 60
  9. 22
  10. 360
  11. 55
  12. 83010
  13. 24
  14. 60
  15. 33
  16. 35
  17. 1300
  18. 2000
  19. 2600
  20. 1/20
  21. 60
  22. 9837
  23. 88600
  24. 47
  25. 2/15
  26. 2
  27. 380
  28. 6655
  29. 14
  30. 140
  31. 27
  32. 15
  33. 120
  34. 2.5
  35. 250
  36. 5
  37. 72
  38. 46
  39. 10
  40. 54

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