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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 731 · 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 304 × 90? (Round each number first.) (a) 54000 (b) 2700 (c) 27000 (d) 270000
  2. 2.2/7 of 14 + 2 × 3 =
  3. 3.Find the LCM of 12, 15 and 2.
  4. 4.The HCF of two numbers is 4 and their LCM is 168. One of the numbers is 28. What is the other number?
  5. 5.Two tanks hold 100 litres and 120 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  6. 6.Find the HCF of 135 and 105.
  7. 7.What is the smallest number you must take away from 412 so that it divides exactly by 7?
  8. 8.A car goes 242 km on 11 litres of petrol. How far can it go on 36 litres (in km)?
  9. 9.How many factors does 71 have?
  10. 10.Find the LCM of 10 and 45.
  11. 11.43 + 10 × 2 − 6 =
  12. 12.The HCF of two numbers is 4 and their LCM is 180. One of the numbers is 36. What is the other number?
  13. 13.Meera takes 30 seconds and Sneha takes 40 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?
  14. 14.If 5 kites cost ₹60, how much do 16 kites cost (in ₹)?
  15. 15.Find the third proportional to 3 and 6 (that is, 3 : 6 = 6 : ?).
  16. 16.Which is closest to 2707 ÷ 31? (a) 900 (b) 90 (c) 180 (d) 45
  17. 17.Karan takes 48 seconds and Diya takes 30 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?
  18. 18.Which is closest to 597 ÷ 29? (a) 200 (b) 10 (c) 20 (d) 40
  19. 19.1/4 of 16 + 4 × 2 =
  20. 20.Which is closest to 896 + 200 + 405? (a) 1700 (b) 1600 (c) 1400 (d) 1500
  21. 21.Which of these numbers divides exactly by 11? (a) 8644 (b) 5496 (c) 2945 (d) 4477
  22. 22.1.5 × 9 =
  23. 23.Which of these numbers divides exactly by 9? (a) 2299 (b) 6206 (c) 1977 (d) 3186
  24. 24.Find the HCF of 48 and 36.
  25. 25.The ratio of boys to girls in a class is 3 : 5. There are 24 boys. How many girls are there?
  26. 26.How many factors does 99 have?
  27. 27.A hall floor is 160 cm long and 120 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  28. 28.(14 + 16) × 2 − 30 =
  29. 29.Find the LCM of 18 and 30.
  30. 30.The HCF of two numbers is 5 and their LCM is 90. One of the numbers is 45. What is the other number?
  31. 31.Diya takes 72 seconds and Aarav takes 30 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.A hall floor is 280 cm long and 120 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  33. 33.What percent of 25 is 3?
  34. 34.(8 + 14) × 2 − 9 =
  35. 35.11 painters can paint a school in 19 days. How many days would 19 painters take, working at the same speed?
  36. 36.If 11 erasers cost ₹66, how much do 3 erasers cost (in ₹)?
  37. 37.What is the smallest number you must add to 788 so that it divides exactly by 3?
  38. 38.1/2 − 1/3 =
  39. 39.Find the LCM of 8, 2 and 3.
  40. 40.57.6 ÷ 6 =

Answer key

  1. 27000
  2. 10
  3. 60
  4. 24
  5. 20
  6. 15
  7. 6
  8. 792
  9. 2
  10. 90
  11. 57
  12. 20
  13. 120
  14. 192
  15. 12
  16. 90
  17. 240
  18. 20
  19. 12
  20. 1500
  21. 4477
  22. 13.5
  23. 3186
  24. 12
  25. 40
  26. 6
  27. 12
  28. 30
  29. 90
  30. 10
  31. 360
  32. 21
  33. 12
  34. 35
  35. 11
  36. 18
  37. 1
  38. 1/6
  39. 24
  40. 9.6

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