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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 157 · 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.Round 83.43 to one decimal place. =
  2. 2.Pooja takes 50 seconds and Priya 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?
  3. 3.If 5 kites cost ₹265, how much do 16 kites cost (in ₹)?
  4. 4.How many factors does 75 have?
  5. 5.What is 25% of 128?
  6. 6.Find the HCF of 30 and 75.
  7. 7.3 painters can paint a school in 17 days. How many days would 17 painters take, working at the same speed?
  8. 8.Round 60994 to the nearest thousand.
  9. 9.What percent of 400 is 100?
  10. 10.Find the third proportional to 3 and 15 (that is, 3 : 15 = 15 : ?).
  11. 11.4.48 + 5.2 =
  12. 12.Three temple bells ring every 24, 10 and 20 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  13. 13.The ratio of boys to girls in a class is 3 : 2. There are 18 boys. How many girls are there?
  14. 14.What percent of 40 is 14?
  15. 15.If 9 kg of rice costs ₹756, how many kg can you buy for ₹420?
  16. 16.Three temple bells ring every 15, 6 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  17. 17.Find the HCF of 70 and 112.
  18. 18.Find the third proportional to 9 and 45 (that is, 9 : 45 = 45 : ?).
  19. 19.A hall floor is 175 cm long and 150 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  20. 20.Meera scored 76 marks out of 80 in a test. What percentage did Meera score?
  21. 21.The ratio of boys to girls in a class is 5 : 2. There are 45 boys. How many girls are there?
  22. 22.What is the smallest number you must add to 848 so that it divides exactly by 6?
  23. 23.Round 90.42 to one decimal place. =
  24. 24.A hostel has enough food for 11 students for 6 days. How many days will the same food last for 3 students?
  25. 25.20 ÷ 5 × 3 + 6 =
  26. 26.Which of these numbers divides exactly by 4? (a) 7686 (b) 3574 (c) 9070 (d) 1340
  27. 27.How many factors does 23 have?
  28. 28.What is the smallest number you must add to 295 so that it divides exactly by 6?
  29. 29.30 + 9 × 6 − 27 =
  30. 30.Three temple bells ring every 6, 15 and 12 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  31. 31.37 − 12 ÷ 6 × 3 =
  32. 32.What is 75% of 520?
  33. 33.Zoya takes 90 seconds and Rahul takes 75 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?
  34. 34.Three temple bells ring every 8, 12 and 9 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  35. 35.56 − 12 ÷ 3 × 8 =
  36. 36.Two tanks hold 175 litres and 125 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  37. 37.6 × (27 − 7) + 16 ÷ 2 =
  38. 38.3/4 of 28 + 6 × 9 =
  39. 39.Find the smallest number bigger than 8 that leaves a remainder of 2 when divided by 4, 3 or 8.
  40. 40.Which is closest to 597 × 70? (Round each number first.) (a) 84000 (b) 42000 (c) 4200 (d) 420000

Answer key

  1. 83.4
  2. 450
  3. 848
  4. 6
  5. 32
  6. 15
  7. 3
  8. 61000
  9. 25
  10. 75
  11. 9.68
  12. 120
  13. 12
  14. 35
  15. 5
  16. 120
  17. 14
  18. 225
  19. 42
  20. 95
  21. 18
  22. 4
  23. 90.4
  24. 22
  25. 18
  26. 1340
  27. 2
  28. 5
  29. 57
  30. 60
  31. 31
  32. 390
  33. 450
  34. 72
  35. 24
  36. 25
  37. 128
  38. 75
  39. 26
  40. 42000

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