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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 933 · 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 smallest number bigger than 9 that leaves a remainder of 1 when divided by 8, 3 or 9.
  2. 2.What is the smallest number you must take away from 402 so that it divides exactly by 7?
  3. 3.How many factors does 78 have?
  4. 4.5 : 9 = 25 : ?
  5. 5.Round 79984 to the nearest thousand.
  6. 6.Two tanks hold 90 litres and 240 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  7. 7.Which is closest to 199 × 48? (Round each number first.) (a) 1000 (b) 20000 (c) 10000 (d) 100000
  8. 8.If 8 mangoes cost ₹224, how much do 19 mangoes cost (in ₹)?
  9. 9.What is 60% of 595?
  10. 10.Find the HCF of 70 and 30.
  11. 11.Three temple bells ring every 6, 12 and 9 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  12. 12.Two tanks hold 120 litres and 100 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  13. 13.Find the third proportional to 7 and 35 (that is, 7 : 35 = 35 : ?).
  14. 14.5 : 3 = 35 : ?
  15. 15.If 6 kg of rice costs ₹156, how many kg can you buy for ₹260?
  16. 16.The ratio of boys to girls in a class is 8 : 3. There are 16 boys. How many girls are there?
  17. 17.5.8 × 3 =
  18. 18.Write 1/2 as a percent.
  19. 19.Find the LCM of 6 and 16.
  20. 20.The HCF of two numbers is 9 and their LCM is 324. One of the numbers is 36. What is the other number?
  21. 21.Which is closest to 502 × 79? (Round each number first.) (a) 40000 (b) 4000 (c) 400000 (d) 80000
  22. 22.What is the smallest number you must take away from 640 so that it divides exactly by 11?
  23. 23.What is the smallest number you must add to 662 so that it divides exactly by 12?
  24. 24.Which of these numbers divides exactly by 4? (a) 5923 (b) 5024 (c) 3141 (d) 5082
  25. 25.7 × (20 − 12) + 36 ÷ 3 =
  26. 26.How many factors does 35 have?
  27. 27.If 5 bottles of juice cost ₹60, how much do 10 bottles of juice cost (in ₹)?
  28. 28.Find the LCM of 12 and 18.
  29. 29.Round 99.78 to one decimal place. =
  30. 30.Find the LCM of 10, 7 and 4.
  31. 31.Which is closest to 899 × 58? (Round each number first.) (a) 540000 (b) 5400 (c) 108000 (d) 54000
  32. 32.What is the smallest number you must take away from 961 so that it divides exactly by 12?
  33. 33.49 + 8 × 9 − 2 =
  34. 34.Find the third proportional to 4 and 12 (that is, 4 : 12 = 12 : ?).
  35. 35.A hall floor is 250 cm long and 200 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  36. 36.Find the HCF of 108 and 24.
  37. 37.30 ÷ 5 × 8 + 14 =
  38. 38.2/5 of 10 + 6 × 7 =
  39. 39.A hall floor is 420 cm long and 360 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  40. 40.4 : 3 = 28 : ?

Answer key

  1. 73
  2. 3
  3. 8
  4. 45
  5. 80000
  6. 30
  7. 10000
  8. 532
  9. 357
  10. 10
  11. 36
  12. 20
  13. 175
  14. 21
  15. 10
  16. 6
  17. 17.4
  18. 50
  19. 48
  20. 81
  21. 40000
  22. 2
  23. 10
  24. 5024
  25. 68
  26. 4
  27. 120
  28. 36
  29. 99.8
  30. 140
  31. 54000
  32. 1
  33. 119
  34. 36
  35. 20
  36. 12
  37. 62
  38. 46
  39. 42
  40. 21

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