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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 858 · 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.Round 85.58 to one decimal place. =
  2. 2.Find the smallest number bigger than 8 that leaves a remainder of 1 when divided by 4, 6 or 8.
  3. 3.32 ÷ 5 =
  4. 4.How many factors does 37 have?
  5. 5.8 : 11 = 48 : ?
  6. 6.How many factors does 52 have?
  7. 7.6/7 − 2/3 =
  8. 8.Two tanks hold 140 litres and 160 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  9. 9.The ratio of boys to girls in a class is 7 : 6. There are 49 boys. How many girls are there?
  10. 10.Find the LCM of 8, 10 and 15.
  11. 11.Find the third proportional to 8 and 32 (that is, 8 : 32 = 32 : ?).
  12. 12.Which is closest to 2702 ÷ 29? (a) 45 (b) 900 (c) 180 (d) 90
  13. 13.Which is closest to 297 × 38? (Round each number first.) (a) 24000 (b) 120000 (c) 12000 (d) 1200
  14. 14.The HCF of two numbers is 7 and their LCM is 126. One of the numbers is 14. What is the other number?
  15. 15.How many factors does 33 have?
  16. 16.4 × (29 − 11) + 72 ÷ 6 =
  17. 17.The HCF of two numbers is 3 and their LCM is 105. One of the numbers is 21. What is the other number?
  18. 18.Find the LCM of 2, 10 and 13.
  19. 19.Find the HCF of 20 and 24.
  20. 20.Which is closest to 702 + 699 + 204? (a) 1600 (b) 1700 (c) 1800 (d) 1500
  21. 21.Find the LCM of 3, 5 and 6.
  22. 22.Which is closest to 896 × 28? (Round each number first.) (a) 27000 (b) 2700 (c) 54000 (d) 270000
  23. 23.What is the smallest number you must take away from 682 so that it divides exactly by 6?
  24. 24.1/2 + 3/4 =
  25. 25.Find the HCF of 28 and 16.
  26. 26.What is the smallest number you must add to 319 so that it divides exactly by 3?
  27. 27.If 11 mangoes cost ₹99, how much do 6 mangoes cost (in ₹)?
  28. 28.1.44 + 6.7 =
  29. 29.Find the HCF of 77 and 66.
  30. 30.Farhan takes 80 seconds and Dev 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?
  31. 31.50% of a number is 215. What is the number?
  32. 32.34.5 ÷ 5 =
  33. 33.25 + 2 × 4 − 4 =
  34. 34.Round 48340 to the nearest hundred.
  35. 35.15% of a number is 33. What is the number?
  36. 36.Find the smallest number bigger than 10 that leaves a remainder of 2 when divided by 10, 3 or 8.
  37. 37.9.21 + 1.9 =
  38. 38.Find the third proportional to 8 and 40 (that is, 8 : 40 = 40 : ?).
  39. 39.Which of these numbers divides exactly by 6? (a) 4795 (b) 6280 (c) 3960 (d) 6263
  40. 40.Find the LCM of 2, 9 and 7.

Answer key

  1. 85.6
  2. 25
  3. 6.4
  4. 2
  5. 66
  6. 6
  7. 4/21
  8. 20
  9. 42
  10. 120
  11. 128
  12. 90
  13. 12000
  14. 63
  15. 4
  16. 84
  17. 15
  18. 130
  19. 4
  20. 1600
  21. 30
  22. 27000
  23. 4
  24. 5/4
  25. 4
  26. 2
  27. 54
  28. 8.14
  29. 11
  30. 720
  31. 430
  32. 6.9
  33. 29
  34. 48300
  35. 220
  36. 122
  37. 11.11
  38. 200
  39. 3960
  40. 126

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