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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 592 · 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 94.39 to one decimal place. =
  2. 2.Round 38.88 to one decimal place. =
  3. 3.How many factors does 99 have?
  4. 4.If 3 kg of rice costs ₹81, how many kg can you buy for ₹189?
  5. 5.If 7 kg of rice costs ₹287, how many kg can you buy for ₹164?
  6. 6.Which of these numbers divides exactly by 3? (a) 1491 (b) 4240 (c) 2299 (d) 5912
  7. 7.Find the LCM of 10 and 15.
  8. 8.3 : 4 = 24 : ?
  9. 9.Three temple bells ring every 12, 15 and 10 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  10. 10.7 × (14 − 12) + 12 ÷ 2 =
  11. 11.1/7 + 2/3 =
  12. 12.If 4 bottles of juice cost ₹224, how much do 14 bottles of juice cost (in ₹)?
  13. 13.(15 + 9) × 5 − 15 =
  14. 14.What is 10% of 570?
  15. 15.(11 + 14) × 3 − 11 =
  16. 16.Write 3/10 as a percent.
  17. 17.4 × (20 − 15) + 21 ÷ 3 =
  18. 18.Two tanks hold 100 litres and 140 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  19. 19.18 + 2 × 3 − 10 =
  20. 20.Which is closest to 902 × 82? (Round each number first.) (a) 720000 (b) 144000 (c) 72000 (d) 7200
  21. 21.Find the LCM of 2, 4 and 15.
  22. 22.The ratio of boys to girls in a class is 5 : 6. There are 15 boys. How many girls are there?
  23. 23.2/3 × 7/11 =
  24. 24.Round 54063 to the nearest thousand.
  25. 25.A car goes 48 km on 2 litres of petrol. How far can it go on 13 litres (in km)?
  26. 26.If 2 erasers cost ₹54, how much do 8 erasers cost (in ₹)?
  27. 27.How many factors does 79 have?
  28. 28.1/3 − 2/10 =
  29. 29.Three temple bells ring every 10, 30 and 4 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  30. 30.The ratio of boys to girls in a class is 4 : 3. There are 16 boys. How many girls are there?
  31. 31.Divide ₹231 between Pooja and Zoya in the ratio 5 : 2. How much does Pooja get (in ₹)?
  32. 32.Find the HCF of 42 and 24.
  33. 33.What is the smallest number you must add to 383 so that it divides exactly by 4?
  34. 34.8.12 + 4.3 =
  35. 35.2 painters can paint a school in 4 days. How many days would 4 painters take, working at the same speed?
  36. 36.Which is closest to 301 × 81? (Round each number first.) (a) 240000 (b) 48000 (c) 24000 (d) 2400
  37. 37.Which of these numbers divides exactly by 6? (a) 4914 (b) 1071 (c) 6460 (d) 4021
  38. 38.The HCF of two numbers is 9 and their LCM is 180. One of the numbers is 36. What is the other number?
  39. 39.Nisha takes 45 seconds and Sneha 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?
  40. 40.How many factors does 20 have?

Answer key

  1. 94.4
  2. 38.9
  3. 6
  4. 7
  5. 4
  6. 1491
  7. 30
  8. 32
  9. 60
  10. 20
  11. 17/21
  12. 784
  13. 105
  14. 57
  15. 64
  16. 30
  17. 27
  18. 20
  19. 14
  20. 72000
  21. 60
  22. 18
  23. 14/33
  24. 54000
  25. 312
  26. 216
  27. 2
  28. 2/15
  29. 60
  30. 12
  31. 165
  32. 6
  33. 1
  34. 12.42
  35. 2
  36. 24000
  37. 4914
  38. 45
  39. 225
  40. 6

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