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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 606 · 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 : 1. There are 20 boys. How many girls are there?
  2. 2.Round 94.89 to one decimal place. =
  3. 3.7.6 × 8 =
  4. 4.5.62 + 3.7 =
  5. 5.6 painters can paint a school in 11 days. How many days would 3 painters take, working at the same speed?
  6. 6.6/11 − 1/9 =
  7. 7.Which of these numbers divides exactly by 9? (a) 6141 (b) 3544 (c) 7578 (d) 4133
  8. 8.11 : 6 = 66 : ?
  9. 9.Find the third proportional to 3 and 6 (that is, 3 : 6 = 6 : ?).
  10. 10.9 : 5 = 72 : ?
  11. 11.The HCF of two numbers is 4 and their LCM is 140. One of the numbers is 28. What is the other number?
  12. 12.7 painters can paint a school in 25 days. How many days would 5 painters take, working at the same speed?
  13. 13.1/7 × 2/5 =
  14. 14.What is the smallest number you must take away from 432 so that it divides exactly by 7?
  15. 15.What is the smallest number you must add to 346 so that it divides exactly by 8?
  16. 16.Write 1/2 as a percent.
  17. 17.5 × (23 − 5) + 32 ÷ 8 =
  18. 18.Find the LCM of 15, 5 and 10.
  19. 19.Three temple bells ring every 15, 5 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  20. 20.Write 13/50 as a percent.
  21. 21.Three temple bells ring every 24, 5 and 4 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  22. 22.Which is closest to 899 + 803 + 395? (a) 2300 (b) 2000 (c) 2200 (d) 2100
  23. 23.5/8 of 56 + 5 × 7 =
  24. 24.Which is closest to 201 × 39? (Round each number first.) (a) 16000 (b) 80000 (c) 800 (d) 8000
  25. 25.Divide ₹275 between Aarav and Aditya in the ratio 3 : 2. How much does Aditya get (in ₹)?
  26. 26.Round 63.23 to one decimal place. =
  27. 27.Divide ₹70 between Pooja and Meera in the ratio 5 : 2. How much does Pooja get (in ₹)?
  28. 28.What is the smallest number you must add to 963 so that it divides exactly by 12?
  29. 29.Two tanks hold 160 litres and 280 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  30. 30.Dev takes 50 seconds and Sneha takes 30 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.What is the smallest number you must take away from 449 so that it divides exactly by 7?
  32. 32.Find the HCF of 35 and 42.
  33. 33.Two tanks hold 100 litres and 40 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  34. 34.Nisha takes 45 seconds and Rohan 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?
  35. 35.How many factors does 34 have?
  36. 36.10/11 − 2/3 =
  37. 37.Find the HCF of 14 and 10.
  38. 38.3.34 + 6.5 =
  39. 39.150% of a number is 867. What is the number?
  40. 40.Find the HCF of 48 and 108.

Answer key

  1. 10
  2. 94.9
  3. 60.8
  4. 9.32
  5. 22
  6. 43/99
  7. 7578
  8. 36
  9. 12
  10. 40
  11. 20
  12. 35
  13. 2/35
  14. 5
  15. 6
  16. 50
  17. 94
  18. 30
  19. 120
  20. 26
  21. 120
  22. 2100
  23. 70
  24. 8000
  25. 110
  26. 63.2
  27. 50
  28. 9
  29. 40
  30. 150
  31. 1
  32. 7
  33. 20
  34. 180
  35. 4
  36. 8/33
  37. 2
  38. 9.84
  39. 578
  40. 12

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