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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 544 · 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.Which is closest to 600 × 78? (Round each number first.) (a) 480000 (b) 48000 (c) 96000 (d) 4800
  2. 2.A hall floor is 200 cm long and 160 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  3. 3.Round 30.79 to one decimal place. =
  4. 4.Round 16.29 to one decimal place. =
  5. 5.2 × (21 − 6) + 36 ÷ 6 =
  6. 6.7 : 14 = 56 : ?
  7. 7.Write 13/50 as a percent.
  8. 8.Find the HCF of 99 and 22.
  9. 9.What percent of 50 is 41?
  10. 10.The ratio of boys to girls in a class is 6 : 1. There are 30 boys. How many girls are there?
  11. 11.A hall floor is 100 cm long and 80 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  12. 12.Two tanks hold 140 litres and 40 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  13. 13.How many factors does 57 have?
  14. 14.Write 4/25 as a percent.
  15. 15.Manav scored 28 marks out of 40 in a test. What percentage did Manav score?
  16. 16.Which is closest to 498 × 39? (Round each number first.) (a) 40000 (b) 2000 (c) 200000 (d) 20000
  17. 17.Find the third proportional to 9 and 18 (that is, 9 : 18 = 18 : ?).
  18. 18.If 8 kg of rice costs ₹592, how many kg can you buy for ₹814?
  19. 19.What is 12% of 250?
  20. 20.The HCF of two numbers is 4 and their LCM is 224. One of the numbers is 28. What is the other number?
  21. 21.1/3 − 2/9 =
  22. 22.What is 20% of 550?
  23. 23.Dev takes 60 seconds and Pooja 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?
  24. 24.A hall floor is 150 cm long and 125 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  25. 25.1/2 × 1/4 =
  26. 26.Find the LCM of 35 and 10.
  27. 27.Find the HCF of 105 and 75.
  28. 28.Find the smallest number bigger than 12 that leaves a remainder of 1 when divided by 12, 3 or 4.
  29. 29.14 + 12 × 5 − 12 =
  30. 30.What percent of 250 is 160?
  31. 31.What is 10% of 600?
  32. 32.(5 + 11) × 2 − 10 =
  33. 33.What is 1/2 of 54 students?
  34. 34.Which is closest to 605 + 795 + 201? (a) 1800 (b) 1500 (c) 1600 (d) 1700
  35. 35.Which is closest to 802 + 602 + 204? (a) 1600 (b) 1800 (c) 1500 (d) 1700
  36. 36.5 painters can paint a school in 19 days. How many days would 19 painters take, working at the same speed?
  37. 37.Divide ₹260 between Kavya and Vivaan in the ratio 9 : 1. How much does Kavya get (in ₹)?
  38. 38.Which is closest to 204 × 18? (Round each number first.) (a) 8000 (b) 4000 (c) 40000 (d) 400
  39. 39.How many factors does 25 have?
  40. 40.How many factors does 54 have?

Answer key

  1. 48000
  2. 20
  3. 30.8
  4. 16.3
  5. 36
  6. 112
  7. 26
  8. 11
  9. 82
  10. 5
  11. 20
  12. 20
  13. 4
  14. 16
  15. 70
  16. 20000
  17. 36
  18. 11
  19. 30
  20. 32
  21. 1/9
  22. 110
  23. 180
  24. 30
  25. 1/8
  26. 70
  27. 15
  28. 13
  29. 62
  30. 64
  31. 60
  32. 22
  33. 27
  34. 1600
  35. 1600
  36. 5
  37. 234
  38. 4000
  39. 3
  40. 8

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