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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 498 · 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.Find the smallest number bigger than 12 that leaves a remainder of 1 when divided by 5, 9 or 12.
  2. 2.Three temple bells ring every 5, 18 and 30 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  3. 3.A car goes 26 km on 2 litres of petrol. How far can it go on 8 litres (in km)?
  4. 4.9 painters can paint a school in 4 days. How many days would 12 painters take, working at the same speed?
  5. 5.47 − 24 ÷ 8 × 6 =
  6. 6.The ratio of boys to girls in a class is 8 : 7. There are 32 boys. How many girls are there?
  7. 7.What is the smallest number you must add to 507 so that it divides exactly by 8?
  8. 8.Find the HCF of 60 and 70.
  9. 9.Which is closest to 199 × 69? (Round each number first.) (a) 14000 (b) 140000 (c) 28000 (d) 1400
  10. 10.Write 17/20 as a percent.
  11. 11.If 10 erasers cost ₹310, how much do 12 erasers cost (in ₹)?
  12. 12.1/3 of 12 + 3 × 3 =
  13. 13.Find the HCF of 52 and 117.
  14. 14.If 5 notebooks cost ₹210, how much do 3 notebooks cost (in ₹)?
  15. 15.Find the third proportional to 8 and 32 (that is, 8 : 32 = 32 : ?).
  16. 16.The ratio of boys to girls in a class is 2 : 5. There are 4 boys. How many girls are there?
  17. 17.Meera takes 36 seconds and Isha takes 60 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.Find the smallest number bigger than 12 that leaves a remainder of 3 when divided by 12, 5 or 10.
  19. 19.How many factors does 19 have?
  20. 20.4/6 − 4/7 =
  21. 21.If 9 pencil boxes cost ₹522, how much do 20 pencil boxes cost (in ₹)?
  22. 22.What is the smallest number you must add to 478 so that it divides exactly by 12?
  23. 23.Two tanks hold 50 litres and 80 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  24. 24.Round 78.08 to one decimal place. =
  25. 25.If 9 kg of rice costs ₹396, how many kg can you buy for ₹220?
  26. 26.Round 67.57 to one decimal place. =
  27. 27.Which of these numbers divides exactly by 3? (a) 1057 (b) 5208 (c) 9088 (d) 6572
  28. 28.Find the HCF of 60 and 75.
  29. 29.If 11 cricket balls cost ₹352, how much do 7 cricket balls cost (in ₹)?
  30. 30.What is 7/8 of 216 kg?
  31. 31.Two tanks hold 40 litres and 90 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  32. 32.What is 50% of 128?
  33. 33.Which is closest to 103 + 397 + 298? (a) 1000 (b) 700 (c) 900 (d) 800
  34. 34.The ratio of boys to girls in a class is 3 : 2. There are 12 boys. How many girls are there?
  35. 35.Divide ₹102 between Rahul and Kavya in the ratio 1 : 5. How much does Kavya get (in ₹)?
  36. 36.Rahul scored 72 marks out of 80 in a test. What percentage did Rahul score?
  37. 37.If 10 pens cost ₹90, how much do 4 pens cost (in ₹)?
  38. 38.What is 7/8 of 32 km?
  39. 39.15% of a number is 57. What is the number?
  40. 40.Find the smallest number bigger than 15 that leaves a remainder of 2 when divided by 8, 15 or 3.

Answer key

  1. 181
  2. 90
  3. 104
  4. 3
  5. 29
  6. 28
  7. 5
  8. 10
  9. 14000
  10. 85
  11. 372
  12. 13
  13. 13
  14. 126
  15. 128
  16. 10
  17. 180
  18. 63
  19. 2
  20. 2/21
  21. 1160
  22. 2
  23. 10
  24. 78.1
  25. 5
  26. 67.6
  27. 5208
  28. 15
  29. 224
  30. 189
  31. 10
  32. 64
  33. 800
  34. 8
  35. 85
  36. 90
  37. 36
  38. 28
  39. 380
  40. 122

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