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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 561 · 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. 1.82 − 45 ÷ 5 × 9 =
  2. 2.3 : 12 = 9 : ?
  3. 3.Find the LCM of 21 and 15.
  4. 4.5.21 + 1.5 =
  5. 5.The HCF of two numbers is 8 and their LCM is 112. One of the numbers is 16. What is the other number?
  6. 6.Write 1/5 as a percent.
  7. 7.Three temple bells ring every 8, 12 and 20 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  8. 8.40 + 6 × 6 − 23 =
  9. 9.Find the LCM of 14, 2 and 15.
  10. 10.Which is closest to 202 × 22? (Round each number first.) (a) 4000 (b) 40000 (c) 400 (d) 8000
  11. 11.Find the third proportional to 9 and 27 (that is, 9 : 27 = 27 : ?).
  12. 12.Which is closest to 1196 ÷ 19? (a) 30 (b) 120 (c) 600 (d) 60
  13. 13.Which is closest to 3499 ÷ 49? (a) 140 (b) 700 (c) 70 (d) 35
  14. 14.A hall floor is 240 cm long and 150 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  15. 15.2/3 × 1/2 =
  16. 16.Divide ₹572 between Karan and Diya in the ratio 5 : 6. How much does Karan get (in ₹)?
  17. 17.If 3 kg of rice costs ₹162, how many kg can you buy for ₹108?
  18. 18.32 + 5 × 5 − 7 =
  19. 19.What is the smallest number you must add to 449 so that it divides exactly by 6?
  20. 20.6 : 9 = 12 : ?
  21. 21.1/4 + 1/7 =
  22. 22.Find the LCM of 15, 8 and 3.
  23. 23.Which is closest to 793 ÷ 39? (a) 40 (b) 10 (c) 200 (d) 20
  24. 24.Two tanks hold 135 litres and 225 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  25. 25.How many factors does 19 have?
  26. 26.The HCF of two numbers is 5 and their LCM is 120. One of the numbers is 15. What is the other number?
  27. 27.If 8 kg of rice costs ₹472, how many kg can you buy for ₹236?
  28. 28.Two tanks hold 125 litres and 225 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  29. 29.Ananya takes 36 seconds and Karan takes 54 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?
  30. 30.If 9 pencil boxes cost ₹234, how much do 5 pencil boxes cost (in ₹)?
  31. 31.20 ÷ 2 × 2 + 29 =
  32. 32.1/2 + 10/12 =
  33. 33.A car goes 18 km on 2 litres of petrol. How far can it go on 33 litres (in km)?
  34. 34.What is 1/2 of 26 kg?
  35. 35.Divide ₹272 between Tara and Ishaan in the ratio 7 : 9. How much does Tara get (in ₹)?
  36. 36.3.76 + 3.6 =
  37. 37.How many factors does 88 have?
  38. 38.Diya scored 3 marks out of 20 in a test. What percentage did Diya score?
  39. 39.Which is closest to 697 × 19? (Round each number first.) (a) 1400 (b) 28000 (c) 14000 (d) 140000
  40. 40.The ratio of boys to girls in a class is 9 : 2. There are 54 boys. How many girls are there?

Answer key

  1. 1
  2. 36
  3. 105
  4. 6.71
  5. 56
  6. 20
  7. 120
  8. 53
  9. 210
  10. 4000
  11. 81
  12. 60
  13. 70
  14. 40
  15. 1/3
  16. 260
  17. 2
  18. 50
  19. 1
  20. 18
  21. 11/28
  22. 120
  23. 20
  24. 45
  25. 2
  26. 40
  27. 4
  28. 25
  29. 108
  30. 130
  31. 49
  32. 4/3
  33. 297
  34. 13
  35. 119
  36. 7.36
  37. 8
  38. 15
  39. 14000
  40. 12

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