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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 322 · 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. 1.10 painters can paint a school in 28 days. How many days would 20 painters take, working at the same speed?
  2. 2.50% of a number is 222. What is the number?
  3. 3.If 6 kg of rice costs ₹192, how many kg can you buy for ₹448?
  4. 4.Three temple bells ring every 6, 10 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  5. 5.How many factors does 45 have?
  6. 6.9 painters can paint a school in 28 days. How many days would 12 painters take, working at the same speed?
  7. 7.What is the smallest number you must take away from 295 so that it divides exactly by 4?
  8. 8.What is the smallest number you must take away from 240 so that it divides exactly by 7?
  9. 9.The HCF of two numbers is 4 and their LCM is 140. One of the numbers is 28. What is the other number?
  10. 10.What is the smallest number you must add to 886 so that it divides exactly by 3?
  11. 11.What percent of 500 is 90?
  12. 12.4/5 + 1/2 =
  13. 13.8.6 × 8 =
  14. 14.102 − 48 ÷ 6 × 9 =
  15. 15.Find the smallest number bigger than 15 that leaves a remainder of 1 when divided by 3, 15 or 9.
  16. 16.If 6 mangoes cost ₹78, how much do 14 mangoes cost (in ₹)?
  17. 17.(18 + 13) × 2 − 4 =
  18. 18.5/11 + 7/10 =
  19. 19.Find the LCM of 42 and 36.
  20. 20.Find the third proportional to 7 and 35 (that is, 7 : 35 = 35 : ?).
  21. 21.Round 18.92 to one decimal place. =
  22. 22.2/11 + 3/4 =
  23. 23.28 − 18 ÷ 3 × 4 =
  24. 24.Three temple bells ring every 10, 6 and 20 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  25. 25.27 + 11 × 9 − 4 =
  26. 26.Two tanks hold 100 litres and 80 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  27. 27.The ratio of boys to girls in a class is 8 : 7. There are 32 boys. How many girls are there?
  28. 28.3/4 − 2/3 =
  29. 29.Aditya takes 60 seconds and Ananya takes 45 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?
  30. 30.What percent of 25 is 23?
  31. 31.The HCF of two numbers is 3 and their LCM is 189. One of the numbers is 21. What is the other number?
  32. 32.Find the LCM of 4 and 9.
  33. 33.If 4 kg of rice costs ₹292, how many kg can you buy for ₹438?
  34. 34.A hall floor is 240 cm long and 180 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  35. 35.Three temple bells ring every 4, 10 and 15 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  36. 36.Write 3/20 as a percent.
  37. 37.Find the HCF of 12 and 42.
  38. 38.A car goes 72 km on 6 litres of petrol. How far can it go on 34 litres (in km)?
  39. 39.How many factors does 92 have?
  40. 40.5/10 × 1/5 =

Answer key

  1. 14
  2. 444
  3. 14
  4. 120
  5. 6
  6. 21
  7. 3
  8. 2
  9. 20
  10. 2
  11. 18
  12. 13/10
  13. 68.8
  14. 30
  15. 46
  16. 182
  17. 58
  18. 127/110
  19. 252
  20. 175
  21. 18.9
  22. 41/44
  23. 4
  24. 60
  25. 122
  26. 20
  27. 28
  28. 1/12
  29. 180
  30. 92
  31. 27
  32. 36
  33. 6
  34. 12
  35. 60
  36. 15
  37. 6
  38. 408
  39. 6
  40. 1/10

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