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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 57 · 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 920 so that it divides exactly by 3?
  2. 2.A hall floor is 175 cm long and 125 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  3. 3.Rohan takes 90 seconds and Tara takes 48 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?
  4. 4.Divide ₹170 between Arjun and Vivaan in the ratio 1 : 4. How much does Arjun get (in ₹)?
  5. 5.6/7 − 1/2 =
  6. 6.Round 43.11 to one decimal place. =
  7. 7.30.6 ÷ 6 =
  8. 8.Find the HCF of 6 and 9.
  9. 9.What is 1/5 of 115 km?
  10. 10.Find the third proportional to 9 and 36 (that is, 9 : 36 = 36 : ?).
  11. 11.Find the LCM of 3 and 7.
  12. 12.1/9 + 4/11 =
  13. 13.What is the smallest number you must take away from 566 so that it divides exactly by 12?
  14. 14.Find the LCM of 8, 4 and 11.
  15. 15.Which is closest to 497 × 31? (Round each number first.) (a) 1500 (b) 15000 (c) 150000 (d) 30000
  16. 16.Find the LCM of 25 and 10.
  17. 17.Find the HCF of 56 and 42.
  18. 18.The HCF of two numbers is 9 and their LCM is 504. One of the numbers is 63. What is the other number?
  19. 19.Find the HCF of 16 and 20.
  20. 20.A car goes 216 km on 12 litres of petrol. How far can it go on 5 litres (in km)?
  21. 21.Round 62568 to the nearest hundred.
  22. 22.(13 + 5) × 8 − 13 =
  23. 23.16 − 12 ÷ 6 × 5 =
  24. 24.The HCF of two numbers is 9 and their LCM is 180. One of the numbers is 36. What is the other number?
  25. 25.Find the third proportional to 9 and 18 (that is, 9 : 18 = 18 : ?).
  26. 26.A car goes 216 km on 12 litres of petrol. How far can it go on 26 litres (in km)?
  27. 27.1/3 of 18 + 6 × 9 =
  28. 28.What is 1/5 of 55 litres?
  29. 29.5/9 of 81 + 7 × 3 =
  30. 30.Three temple bells ring every 20, 12 and 24 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  31. 31.What is the smallest number you must add to 770 so that it divides exactly by 9?
  32. 32.Find the smallest number bigger than 15 that leaves a remainder of 7 when divided by 8, 15 or 12.
  33. 33.If 10 pens cost ₹50, how much do 15 pens cost (in ₹)?
  34. 34.1/5 of 10 + 8 × 7 =
  35. 35.What is the smallest number you must take away from 349 so that it divides exactly by 11?
  36. 36.Which is closest to 404 × 39? (Round each number first.) (a) 32000 (b) 160000 (c) 1600 (d) 16000
  37. 37.Priya takes 48 seconds and Zoya 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?
  38. 38.Find the LCM of 28 and 8.
  39. 39.(14 + 8) × 9 − 14 =
  40. 40.What is the smallest number you must add to 630 so that it divides exactly by 4?

Answer key

  1. 1
  2. 35
  3. 720
  4. 34
  5. 5/14
  6. 43.1
  7. 5.1
  8. 3
  9. 23
  10. 144
  11. 21
  12. 47/99
  13. 2
  14. 88
  15. 15000
  16. 50
  17. 14
  18. 72
  19. 4
  20. 90
  21. 62600
  22. 131
  23. 6
  24. 45
  25. 36
  26. 468
  27. 60
  28. 11
  29. 66
  30. 120
  31. 4
  32. 127
  33. 75
  34. 58
  35. 8
  36. 16000
  37. 720
  38. 56
  39. 184
  40. 2

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