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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 395 · 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. 1.2/7 + 3/9 =
  2. 2.25 + 6 × 5 − 22 =
  3. 3.The ratio of boys to girls in a class is 7 : 4. There are 42 boys. How many girls are there?
  4. 4.Three temple bells ring every 24, 30 and 15 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  5. 5.If 4 pens cost ₹88, how much do 9 pens cost (in ₹)?
  6. 6.The ratio of boys to girls in a class is 3 : 1. There are 9 boys. How many girls are there?
  7. 7.Which is closest to 398 × 79? (Round each number first.) (a) 320000 (b) 3200 (c) 32000 (d) 64000
  8. 8.Divide ₹180 between Rohan and Aarav in the ratio 8 : 1. How much does Aarav get (in ₹)?
  9. 9.6 painters can paint a school in 10 days. How many days would 12 painters take, working at the same speed?
  10. 10.If 4 erasers cost ₹28, how much do 7 erasers cost (in ₹)?
  11. 11.Sneha scored 56 marks out of 80 in a test. What percentage did Sneha score?
  12. 12.8.16 + 4.8 =
  13. 13.Find the smallest number bigger than 9 that leaves a remainder of 1 when divided by 8, 4 or 9.
  14. 14.Find the HCF of 28 and 126.
  15. 15.11 : 4 = 22 : ?
  16. 16.3 × (12 − 11) + 84 ÷ 7 =
  17. 17.What is the smallest number you must take away from 284 so that it divides exactly by 11?
  18. 18.Find the smallest number bigger than 10 that leaves a remainder of 1 when divided by 4, 10 or 5.
  19. 19.A car goes 160 km on 10 litres of petrol. How far can it go on 5 litres (in km)?
  20. 20.Find the smallest number bigger than 15 that leaves a remainder of 2 when divided by 4, 15 or 10.
  21. 21.The HCF of two numbers is 7 and their LCM is 196. One of the numbers is 28. What is the other number?
  22. 22.35 + 4 × 10 − 12 =
  23. 23.6 × (23 − 4) + 24 ÷ 8 =
  24. 24.A hall floor is 140 cm long and 40 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  25. 25.Which of these numbers divides exactly by 3? (a) 5341 (b) 1741 (c) 6185 (d) 2985
  26. 26.If 9 kg of rice costs ₹738, how many kg can you buy for ₹164?
  27. 27.38.4 ÷ 6 =
  28. 28.8.34 + 1.4 =
  29. 29.Which is closest to 594 ÷ 19? (a) 30 (b) 15 (c) 60 (d) 300
  30. 30.What percent of 50 is 14?
  31. 31.What is the smallest number you must add to 450 so that it divides exactly by 12?
  32. 32.Find the HCF of 70 and 42.
  33. 33.Find the HCF of 105 and 30.
  34. 34.The HCF of two numbers is 8 and their LCM is 96. One of the numbers is 24. What is the other number?
  35. 35.Find the HCF of 55 and 22.
  36. 36.Which of these numbers divides exactly by 8? (a) 5945 (b) 3548 (c) 3268 (d) 9336
  37. 37.1/3 + 4/5 =
  38. 38.Which is closest to 198 × 22? (Round each number first.) (a) 40000 (b) 4000 (c) 400 (d) 8000
  39. 39.Round 20.79 to one decimal place. =
  40. 40.Which is closest to 201 × 28? (Round each number first.) (a) 600 (b) 60000 (c) 12000 (d) 6000

Answer key

  1. 13/21
  2. 33
  3. 24
  4. 120
  5. 198
  6. 3
  7. 32000
  8. 20
  9. 5
  10. 49
  11. 70
  12. 12.96
  13. 73
  14. 14
  15. 8
  16. 15
  17. 9
  18. 21
  19. 80
  20. 62
  21. 49
  22. 63
  23. 117
  24. 14
  25. 2985
  26. 2
  27. 6.4
  28. 9.74
  29. 30
  30. 28
  31. 6
  32. 14
  33. 15
  34. 32
  35. 11
  36. 9336
  37. 17/15
  38. 4000
  39. 20.8
  40. 6000

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