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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 84 · 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. 1.1/2 + 2/4 =
  2. 2.48 − 27 ÷ 3 × 2 =
  3. 3.8.4 ÷ 7 =
  4. 4.Zoya takes 45 seconds and Tara 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?
  5. 5.(19 + 3) × 4 − 3 =
  6. 6.The ratio of boys to girls in a class is 7 : 9. There are 70 boys. How many girls are there?
  7. 7.If 9 erasers cost ₹216, how much do 5 erasers cost (in ₹)?
  8. 8.Find the LCM of 54 and 42.
  9. 9.How many factors does 31 have?
  10. 10.What is 1/3 of ₹84?
  11. 11.1/2 − 1/6 =
  12. 12.3 × (11 − 1) + 24 ÷ 2 =
  13. 13.Diya scored 16 marks out of 80 in a test. What percentage did Diya score?
  14. 14.Round 21.08 to one decimal place. =
  15. 15.Two tanks hold 35 litres and 25 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  16. 16.Find the LCM of 6 and 16.
  17. 17.Find the LCM of 20 and 24.
  18. 18.Which of these numbers divides exactly by 9? (a) 6626 (b) 3375 (c) 1787 (d) 1370
  19. 19.3 × (28 − 21) + 49 ÷ 7 =
  20. 20.A car goes 132 km on 11 litres of petrol. How far can it go on 20 litres (in km)?
  21. 21.What is the smallest number you must take away from 788 so that it divides exactly by 13?
  22. 22.Divide ₹348 between Ananya and Nisha in the ratio 7 : 5. How much does Ananya get (in ₹)?
  23. 23.A hall floor is 175 cm long and 100 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  24. 24.Find the HCF of 6 and 9.
  25. 25.(18 + 9) × 3 − 9 =
  26. 26.Which of these numbers divides exactly by 11? (a) 6188 (b) 4534 (c) 5860 (d) 1771
  27. 27.(9 + 10) × 7 − 27 =
  28. 28.What is the smallest number you must take away from 171 so that it divides exactly by 6?
  29. 29.Find the HCF of 21 and 9.
  30. 30.The HCF of two numbers is 9 and their LCM is 252. One of the numbers is 36. What is the other number?
  31. 31.Find the third proportional to 8 and 16 (that is, 8 : 16 = 16 : ?).
  32. 32.The HCF of two numbers is 2 and their LCM is 144. One of the numbers is 18. What is the other number?
  33. 33.Find the LCM of 35 and 25.
  34. 34.If 5 cricket balls cost ₹225, how much do 17 cricket balls cost (in ₹)?
  35. 35.3 : 7 = 21 : ?
  36. 36.Round 35479 to the nearest ten.
  37. 37.Farhan takes 90 seconds and Priya 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?
  38. 38.Two tanks hold 60 litres and 135 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  39. 39.Find the LCM of 6, 14 and 3.
  40. 40.10 : 7 = 30 : ?

Answer key

  1. 1
  2. 30
  3. 1.2
  4. 360
  5. 85
  6. 90
  7. 120
  8. 378
  9. 2
  10. 28
  11. 1/3
  12. 42
  13. 20
  14. 21.1
  15. 5
  16. 48
  17. 120
  18. 3375
  19. 28
  20. 240
  21. 8
  22. 203
  23. 28
  24. 3
  25. 72
  26. 1771
  27. 106
  28. 3
  29. 3
  30. 63
  31. 32
  32. 16
  33. 175
  34. 765
  35. 49
  36. 35480
  37. 450
  38. 15
  39. 42
  40. 21

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