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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 479 · 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.Three temple bells ring every 6, 5 and 15 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  2. 2.A hall floor is 160 cm long and 60 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  3. 3.The ratio of boys to girls in a class is 5 : 2. There are 10 boys. How many girls are there?
  4. 4.5 painters can paint a school in 23 days. How many days would 23 painters take, working at the same speed?
  5. 5.Find the LCM of 36 and 8.
  6. 6.3/10 × 6/9 =
  7. 7.2/4 × 6/7 =
  8. 8.Find the HCF of 26 and 117.
  9. 9.Divide ₹265 between Ishaan and Aditya in the ratio 4 : 1. How much does Aditya get (in ₹)?
  10. 10.Find the LCM of 2, 8 and 15.
  11. 11.10% of a number is 27. What is the number?
  12. 12.24 − 12 ÷ 4 × 4 =
  13. 13.3/4 × 3/7 =
  14. 14.What is 12% of 425?
  15. 15.Find the third proportional to 7 and 21 (that is, 7 : 21 = 21 : ?).
  16. 16.A hall floor is 75 cm long and 50 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  17. 17.If 9 kg of rice costs ₹513, how many kg can you buy for ₹114?
  18. 18.A hall floor is 175 cm long and 50 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  19. 19.Find the HCF of 70 and 112.
  20. 20.How many factors does 18 have?
  21. 21.The ratio of boys to girls in a class is 4 : 5. There are 28 boys. How many girls are there?
  22. 22.7.86 + 3.5 =
  23. 23.Write 1/20 as a percent.
  24. 24.If 5 bottles of juice cost ₹275, how much do 6 bottles of juice cost (in ₹)?
  25. 25.Find the HCF of 21 and 35.
  26. 26.What is the smallest number you must take away from 461 so that it divides exactly by 11?
  27. 27.15 + 4 × 5 − 1 =
  28. 28.2/3 × 8/12 =
  29. 29.A car goes 80 km on 5 litres of petrol. How far can it go on 29 litres (in km)?
  30. 30.40 ÷ 4 × 2 + 14 =
  31. 31.Rohan takes 90 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?
  32. 32.2.51 + 1.2 =
  33. 33.Find the LCM of 14, 12 and 3.
  34. 34.Round 26.36 to one decimal place. =
  35. 35.Which is closest to 702 + 199 + 195? (a) 1200 (b) 1300 (c) 1100 (d) 1000
  36. 36.If 10 erasers cost ₹250, how much do 17 erasers cost (in ₹)?
  37. 37.If 3 kg of rice costs ₹156, how many kg can you buy for ₹468?
  38. 38.Round 58474 to the nearest hundred.
  39. 39.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?
  40. 40.Find the smallest number bigger than 6 that leaves a remainder of 1 when divided by 6, 4 or 5.

Answer key

  1. 30
  2. 24
  3. 4
  4. 5
  5. 72
  6. 1/5
  7. 3/7
  8. 13
  9. 53
  10. 120
  11. 270
  12. 12
  13. 9/28
  14. 51
  15. 63
  16. 6
  17. 2
  18. 14
  19. 14
  20. 6
  21. 35
  22. 11.36
  23. 5
  24. 330
  25. 7
  26. 10
  27. 34
  28. 4/9
  29. 464
  30. 34
  31. 180
  32. 3.71
  33. 84
  34. 26.4
  35. 1100
  36. 425
  37. 9
  38. 58500
  39. 50
  40. 61

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