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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 719 · 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.What is the smallest number you must add to 950 so that it divides exactly by 3?
  2. 2.The HCF of two numbers is 8 and their LCM is 160. One of the numbers is 40. What is the other number?
  3. 3.7.4 × 6 =
  4. 4.If 9 kg of rice costs ₹324, how many kg can you buy for ₹468?
  5. 5.What is the smallest number you must take away from 513 so that it divides exactly by 12?
  6. 6.Find the LCM of 10, 6 and 2.
  7. 7.The ratio of boys to girls in a class is 6 : 5. There are 24 boys. How many girls are there?
  8. 8.If 11 notebooks cost ₹429, how much do 20 notebooks cost (in ₹)?
  9. 9.6/9 + 2/12 =
  10. 10.36 − 14 ÷ 2 × 3 =
  11. 11.The HCF of two numbers is 7 and their LCM is 84. One of the numbers is 21. What is the other number?
  12. 12.What is the smallest number you must add to 345 so that it divides exactly by 13?
  13. 13.Find the LCM of 6, 9 and 8.
  14. 14.Round 43663 to the nearest hundred.
  15. 15.18 ÷ 2 × 9 + 9 =
  16. 16.Tara scored 24 marks out of 25 in a test. What percentage did Tara score?
  17. 17.2.4 ÷ 2 =
  18. 18.Two tanks hold 20 litres and 15 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  19. 19.The ratio of boys to girls in a class is 2 : 9. There are 12 boys. How many girls are there?
  20. 20.Round 87476 to the nearest ten.
  21. 21.Find the LCM of 11, 3 and 15.
  22. 22.8.84 + 3.8 =
  23. 23.Which is closest to 603 × 19? (Round each number first.) (a) 120000 (b) 24000 (c) 1200 (d) 12000
  24. 24.3.6 ÷ 3 =
  25. 25.What is the smallest number you must take away from 691 so that it divides exactly by 13?
  26. 26.Find the LCM of 2, 6 and 11.
  27. 27.29 + 2 × 5 − 5 =
  28. 28.Which of these numbers divides exactly by 9? (a) 2772 (b) 5642 (c) 7080 (d) 5188
  29. 29.Find the third proportional to 3 and 6 (that is, 3 : 6 = 6 : ?).
  30. 30.If 7 mangoes cost ₹315, how much do 3 mangoes cost (in ₹)?
  31. 31.Round 3656 to the nearest thousand.
  32. 32.How many factors does 44 have?
  33. 33.Arjun takes 30 seconds and Ishaan takes 80 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?
  34. 34.4 : 13 = 36 : ?
  35. 35.Round 40.56 to one decimal place. =
  36. 36.Find the LCM of 32 and 36.
  37. 37.Write 1/2 as a percent.
  38. 38.What is 2/7 of 133 litres?
  39. 39.If 3 kg of rice costs ₹180, how many kg can you buy for ₹540?
  40. 40.Sneha takes 50 seconds and Farhan takes 60 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?

Answer key

  1. 1
  2. 32
  3. 44.4
  4. 13
  5. 9
  6. 30
  7. 20
  8. 780
  9. 5/6
  10. 15
  11. 28
  12. 6
  13. 72
  14. 43700
  15. 90
  16. 96
  17. 1.2
  18. 5
  19. 54
  20. 87480
  21. 165
  22. 12.64
  23. 12000
  24. 1.2
  25. 2
  26. 66
  27. 34
  28. 2772
  29. 12
  30. 135
  31. 4000
  32. 6
  33. 240
  34. 117
  35. 40.6
  36. 288
  37. 50
  38. 38
  39. 9
  40. 300

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