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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 417 · 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.The ratio of boys to girls in a class is 2 : 5. There are 4 boys. How many girls are there?
  2. 2.The ratio of boys to girls in a class is 7 : 1. There are 70 boys. How many girls are there?
  3. 3.1/3 + 2/11 =
  4. 4.5% of a number is 8. What is the number?
  5. 5.5 × (15 − 6) + 12 ÷ 2 =
  6. 6.Write 3/50 as a percent.
  7. 7.34 + 10 × 4 − 29 =
  8. 8.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?
  9. 9.A hall floor is 150 cm long and 120 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  10. 10.Which of these numbers divides exactly by 3? (a) 2052 (b) 5524 (c) 4540 (d) 3452
  11. 11.Find the third proportional to 9 and 18 (that is, 9 : 18 = 18 : ?).
  12. 12.Which of these numbers divides exactly by 11? (a) 5725 (b) 1504 (c) 7743 (d) 8074
  13. 13.Which is closest to 303 × 19? (Round each number first.) (a) 60000 (b) 6000 (c) 12000 (d) 600
  14. 14.1.2 × 9 =
  15. 15.Round 76922 to the nearest thousand.
  16. 16.If 10 cricket balls cost ₹310, how much do 12 cricket balls cost (in ₹)?
  17. 17.5% of a number is 29. What is the number?
  18. 18.Three temple bells ring every 15, 6 and 18 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  19. 19.A hall floor is 100 cm long and 60 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  20. 20.Round 60474 to the nearest ten.
  21. 21.Find the smallest number bigger than 12 that leaves a remainder of 2 when divided by 6, 12 or 4.
  22. 22.10 : 15 = 30 : ?
  23. 23.A hostel has enough food for 10 students for 9 days. How many days will the same food last for 2 students?
  24. 24.Which of these numbers divides exactly by 9? (a) 8098 (b) 7020 (c) 4859 (d) 9983
  25. 25.Find the LCM of 9 and 5.
  26. 26.Find the LCM of 15 and 40.
  27. 27.(16 + 10) × 3 − 9 =
  28. 28.2.3 × 4 =
  29. 29.Which is closest to 598 + 405 + 503? (a) 1700 (b) 1500 (c) 1400 (d) 1600
  30. 30.7/9 + 1/2 =
  31. 31.How many factors does 98 have?
  32. 32.Find the third proportional to 7 and 14 (that is, 7 : 14 = 14 : ?).
  33. 33.What is the smallest number you must take away from 330 so that it divides exactly by 8?
  34. 34.11 : 4 = 88 : ?
  35. 35.Find the LCM of 9 and 24.
  36. 36.Which is closest to 902 + 804 + 700? (a) 2400 (b) 2500 (c) 2600 (d) 2300
  37. 37.Which is closest to 899 × 40? (Round each number first.) (a) 72000 (b) 36000 (c) 360000 (d) 3600
  38. 38.Find the HCF of 70 and 112.
  39. 39.Ananya takes 60 seconds and Kavya takes 90 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. 40.3.6 × 8 =

Answer key

  1. 10
  2. 10
  3. 17/33
  4. 160
  5. 51
  6. 6
  7. 45
  8. 14
  9. 20
  10. 2052
  11. 36
  12. 8074
  13. 6000
  14. 10.8
  15. 77000
  16. 372
  17. 580
  18. 90
  19. 15
  20. 60470
  21. 14
  22. 45
  23. 45
  24. 7020
  25. 45
  26. 120
  27. 69
  28. 9.2
  29. 1500
  30. 23/18
  31. 6
  32. 28
  33. 2
  34. 32
  35. 72
  36. 2400
  37. 36000
  38. 14
  39. 180
  40. 28.8

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