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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 907 · 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 × (19 − 2) + 21 ÷ 7 =
  2. 2.Find the LCM of 4 and 6.
  3. 3.Vivaan takes 54 seconds and Tara 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?
  4. 4.7 × (29 − 6) + 80 ÷ 8 =
  5. 5.Find the LCM of 7, 12 and 14.
  6. 6.83.7 ÷ 9 =
  7. 7.If 7 kg of rice costs ₹315, how many kg can you buy for ₹630?
  8. 8.What percent of 400 is 32?
  9. 9.1/5 + 4/6 =
  10. 10.12% of a number is 12. What is the number?
  11. 11.5% of a number is 15. What is the number?
  12. 12.Divide ₹561 between Rohan and Diya in the ratio 2 : 9. How much does Rohan get (in ₹)?
  13. 13.The HCF of two numbers is 7 and their LCM is 168. One of the numbers is 21. What is the other number?
  14. 14.8/10 + 9/12 =
  15. 15.A hostel has enough food for 7 students for 5 days. How many days will the same food last for 5 students?
  16. 16.8 ÷ 4 × 8 + 21 =
  17. 17.56 ÷ 7 × 4 + 13 =
  18. 18.A hostel has enough food for 11 students for 9 days. How many days will the same food last for 9 students?
  19. 19.Find the LCM of 5, 2 and 6.
  20. 20.4 : 5 = 12 : ?
  21. 21.Find the third proportional to 7 and 21 (that is, 7 : 21 = 21 : ?).
  22. 22.Which is closest to 902 × 58? (Round each number first.) (a) 5400 (b) 540000 (c) 54000 (d) 108000
  23. 23.Find the HCF of 105 and 45.
  24. 24.Which is closest to 499 × 41? (Round each number first.) (a) 20000 (b) 2000 (c) 200000 (d) 40000
  25. 25.20% of a number is 5. What is the number?
  26. 26.A car goes 70 km on 7 litres of petrol. How far can it go on 5 litres (in km)?
  27. 27.A car goes 40 km on 4 litres of petrol. How far can it go on 2 litres (in km)?
  28. 28.Aditya scored 8 marks out of 80 in a test. What percentage did Aditya score?
  29. 29.Three temple bells ring every 6, 12 and 9 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  30. 30.A hostel has enough food for 6 students for 6 days. How many days will the same food last for 18 students?
  31. 31.What percent of 25 is 1?
  32. 32.1/2 − 1/10 =
  33. 33.Find the LCM of 27 and 12.
  34. 34.10 : 11 = 30 : ?
  35. 35.10/12 × 5/8 =
  36. 36.Write 31/50 as a percent.
  37. 37.Which is closest to 299 × 80? (Round each number first.) (a) 24000 (b) 2400 (c) 48000 (d) 240000
  38. 38.The HCF of two numbers is 6 and their LCM is 36. One of the numbers is 18. What is the other number?
  39. 39.A hall floor is 90 cm long and 60 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  40. 40.Which is closest to 900 × 48? (Round each number first.) (a) 45000 (b) 90000 (c) 4500 (d) 450000

Answer key

  1. 37
  2. 12
  3. 540
  4. 171
  5. 84
  6. 9.3
  7. 14
  8. 8
  9. 13/15
  10. 100
  11. 300
  12. 102
  13. 56
  14. 31/20
  15. 7
  16. 37
  17. 45
  18. 11
  19. 30
  20. 15
  21. 63
  22. 54000
  23. 15
  24. 20000
  25. 25
  26. 50
  27. 20
  28. 10
  29. 36
  30. 2
  31. 4
  32. 2/5
  33. 108
  34. 33
  35. 25/48
  36. 62
  37. 24000
  38. 12
  39. 6
  40. 45000

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