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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 16 · 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 LCM of 2 and 7.
  2. 2.Three temple bells ring every 5, 15 and 10 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  3. 3.The ratio of boys to girls in a class is 1 : 5. There are 8 boys. How many girls are there?
  4. 4.Which of these numbers divides exactly by 9? (a) 3580 (b) 4711 (c) 1476 (d) 6962
  5. 5.How many factors does 53 have?
  6. 6.Write 1/5 as a percent.
  7. 7.Which is closest to 399 × 92? (Round each number first.) (a) 360000 (b) 72000 (c) 3600 (d) 36000
  8. 8.6.8 × 8 =
  9. 9.Round 12.82 to one decimal place. =
  10. 10.What percent of 400 is 336?
  11. 11.36 ÷ 3 × 4 + 7 =
  12. 12.Divide ₹175 between Ananya and Aditya in the ratio 4 : 1. How much does Aditya get (in ₹)?
  13. 13.Round 30.73 to one decimal place. =
  14. 14.If 6 pens cost ₹270, how much do 15 pens cost (in ₹)?
  15. 15.Farhan takes 50 seconds and Dev 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?
  16. 16.Round 17260 to the nearest thousand.
  17. 17.The HCF of two numbers is 5 and their LCM is 75. One of the numbers is 15. What is the other number?
  18. 18.Round 24814 to the nearest hundred.
  19. 19.Find the third proportional to 3 and 6 (that is, 3 : 6 = 6 : ?).
  20. 20.How many factors does 100 have?
  21. 21.Which is closest to 1602 ÷ 41? (a) 40 (b) 80 (c) 400 (d) 20
  22. 22.3 × (25 − 19) + 10 ÷ 5 =
  23. 23.Two tanks hold 120 litres and 160 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  24. 24.What is 75% of 52?
  25. 25.Which of these numbers divides exactly by 8? (a) 7571 (b) 3432 (c) 2257 (d) 4182
  26. 26.Isha takes 90 seconds and Aditya 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?
  27. 27.Which of these numbers divides exactly by 3? (a) 3461 (b) 5032 (c) 2535 (d) 9265
  28. 28.Which is closest to 899 + 96 + 95? (a) 1100 (b) 1200 (c) 1000 (d) 1300
  29. 29.If 3 erasers cost ₹36, how much do 15 erasers cost (in ₹)?
  30. 30.Three temple bells ring every 12, 5 and 24 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  31. 31.What percent of 250 is 35?
  32. 32.75 − 64 ÷ 8 × 8 =
  33. 33.If 10 mangoes cost ₹320, how much do 8 mangoes cost (in ₹)?
  34. 34.Three temple bells ring every 12, 4 and 5 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  35. 35.What is the smallest number you must add to 178 so that it divides exactly by 8?
  36. 36.Write 9/10 as a percent.
  37. 37.4.9 × 2 =
  38. 38.What is the smallest number you must add to 248 so that it divides exactly by 3?
  39. 39.Two tanks hold 40 litres and 45 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  40. 40.43 + 7 × 2 − 14 =

Answer key

  1. 14
  2. 30
  3. 40
  4. 1476
  5. 2
  6. 20
  7. 36000
  8. 54.4
  9. 12.8
  10. 84
  11. 55
  12. 35
  13. 30.7
  14. 675
  15. 450
  16. 17000
  17. 25
  18. 24800
  19. 12
  20. 9
  21. 40
  22. 20
  23. 40
  24. 39
  25. 3432
  26. 180
  27. 2535
  28. 1100
  29. 180
  30. 120
  31. 14
  32. 11
  33. 256
  34. 60
  35. 6
  36. 90
  37. 9.8
  38. 1
  39. 5
  40. 43

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