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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 153 · 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 HCF of 56 and 64.
  2. 2.Round 30432 to the nearest hundred.
  3. 3.A car goes 92 km on 4 litres of petrol. How far can it go on 28 litres (in km)?
  4. 4.Find the HCF of 44 and 99.
  5. 5.Find the LCM of 14, 10 and 4.
  6. 6.1/5 of 25 + 3 × 3 =
  7. 7.7 : 12 = 21 : ?
  8. 8.Find the LCM of 5, 2 and 3.
  9. 9.Farhan takes 75 seconds and Nisha 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?
  10. 10.If 2 cricket balls cost ₹40, how much do 8 cricket balls cost (in ₹)?
  11. 11.How many factors does 93 have?
  12. 12.If 6 kg of rice costs ₹444, how many kg can you buy for ₹666?
  13. 13.Which of these numbers divides exactly by 3? (a) 9659 (b) 1646 (c) 1323 (d) 3236
  14. 14.Rohan takes 80 seconds and Rahul 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?
  15. 15.Find the third proportional to 6 and 24 (that is, 6 : 24 = 24 : ?).
  16. 16.Two tanks hold 150 litres and 200 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  17. 17.Find the LCM of 10 and 6.
  18. 18.What is 1/2 of ₹30?
  19. 19.Find the third proportional to 9 and 18 (that is, 9 : 18 = 18 : ?).
  20. 20.If 3 pencil boxes cost ₹141, how much do 16 pencil boxes cost (in ₹)?
  21. 21.Round 38993 to the nearest ten.
  22. 22.Which is closest to 197 × 38? (Round each number first.) (a) 8000 (b) 16000 (c) 80000 (d) 800
  23. 23.7.2 ÷ 2 =
  24. 24.A hall floor is 400 cm long and 350 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  25. 25.10% of a number is 15. What is the number?
  26. 26.Find the HCF of 12 and 54.
  27. 27.Find the smallest number bigger than 12 that leaves a remainder of 2 when divided by 12, 5 or 6.
  28. 28.Find the third proportional to 5 and 25 (that is, 5 : 25 = 25 : ?).
  29. 29.42 − 36 ÷ 4 × 2 =
  30. 30.42 − 35 ÷ 7 × 7 =
  31. 31.Three temple bells ring every 18, 4 and 6 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  32. 32.If 3 kg of rice costs ₹123, how many kg can you buy for ₹287?
  33. 33.9 painters can paint a school in 26 days. How many days would 6 painters take, working at the same speed?
  34. 34.Find the third proportional to 5 and 20 (that is, 5 : 20 = 20 : ?).
  35. 35.Divide ₹230 between Dev and Vivaan in the ratio 9 : 1. How much does Dev get (in ₹)?
  36. 36.4 : 7 = 28 : ?
  37. 37.What is 10% of 510?
  38. 38.What is the smallest number you must take away from 997 so that it divides exactly by 9?
  39. 39.5/8 of 48 + 7 × 6 =
  40. 40.6 painters can paint a school in 7 days. How many days would 3 painters take, working at the same speed?

Answer key

  1. 8
  2. 30400
  3. 644
  4. 11
  5. 140
  6. 14
  7. 36
  8. 30
  9. 450
  10. 160
  11. 4
  12. 9
  13. 1323
  14. 240
  15. 96
  16. 50
  17. 30
  18. 15
  19. 36
  20. 752
  21. 38990
  22. 8000
  23. 3.6
  24. 56
  25. 150
  26. 6
  27. 62
  28. 125
  29. 24
  30. 7
  31. 36
  32. 7
  33. 39
  34. 80
  35. 207
  36. 49
  37. 51
  38. 7
  39. 72
  40. 14

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