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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 567 · 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.Which is closest to 399 ÷ 21? (a) 40 (b) 20 (c) 10 (d) 200
  2. 2.If 7 erasers cost ₹21, how much do 19 erasers cost (in ₹)?
  3. 3.Three temple bells ring every 20, 24 and 15 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  4. 4.A car goes 20 km on 2 litres of petrol. How far can it go on 24 litres (in km)?
  5. 5.Find the HCF of 70 and 60.
  6. 6.Three temple bells ring every 15, 5 and 12 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  7. 7.Which of these numbers divides exactly by 6? (a) 8616 (b) 2661 (c) 3428 (d) 5309
  8. 8.Find the third proportional to 6 and 12 (that is, 6 : 12 = 12 : ?).
  9. 9.Round 76769 to the nearest thousand.
  10. 10.30% of a number is 108. What is the number?
  11. 11.Find the LCM of 4, 13 and 8.
  12. 12.A car goes 176 km on 11 litres of petrol. How far can it go on 23 litres (in km)?
  13. 13.Find the third proportional to 4 and 8 (that is, 4 : 8 = 8 : ?).
  14. 14.Find the HCF of 39 and 104.
  15. 15.Write 9/10 as a percent.
  16. 16.The HCF of two numbers is 2 and their LCM is 36. One of the numbers is 4. What is the other number?
  17. 17.4 × (17 − 12) + 10 ÷ 5 =
  18. 18.Which is closest to 900 + 603 + 204? (a) 1700 (b) 1800 (c) 1600 (d) 1900
  19. 19.If 5 kg of rice costs ₹130, how many kg can you buy for ₹78?
  20. 20.75% of a number is 312. What is the number?
  21. 21.If 5 kg of rice costs ₹390, how many kg can you buy for ₹780?
  22. 22.3.33 + 7.7 =
  23. 23.2 painters can paint a school in 30 days. How many days would 3 painters take, working at the same speed?
  24. 24.The HCF of two numbers is 5 and their LCM is 90. One of the numbers is 45. What is the other number?
  25. 25.(5 + 3) × 5 − 11 =
  26. 26.3 × (27 − 24) + 84 ÷ 7 =
  27. 27.Three temple bells ring every 6, 8 and 18 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  28. 28.A hall floor is 175 cm long and 125 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  29. 29.What is 12% of 275?
  30. 30.9.2 × 5 =
  31. 31.Find the LCM of 30 and 24.
  32. 32.What is the smallest number you must take away from 219 so that it divides exactly by 13?
  33. 33.Three temple bells ring every 10, 5 and 4 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  34. 34.How many factors does 62 have?
  35. 35.26 + 3 × 3 − 3 =
  36. 36.Round 43190 to the nearest thousand.
  37. 37.Three temple bells ring every 4, 18 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  38. 38.A hall floor is 150 cm long and 100 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  39. 39.Divide ₹63 between Saanvi and Nisha in the ratio 7 : 2. How much does Nisha get (in ₹)?
  40. 40.A hall floor is 135 cm long and 90 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?

Answer key

  1. 20
  2. 57
  3. 120
  4. 240
  5. 10
  6. 60
  7. 8616
  8. 24
  9. 77000
  10. 360
  11. 104
  12. 368
  13. 16
  14. 13
  15. 90
  16. 18
  17. 22
  18. 1700
  19. 3
  20. 416
  21. 10
  22. 11.03
  23. 20
  24. 10
  25. 29
  26. 21
  27. 72
  28. 35
  29. 33
  30. 46
  31. 120
  32. 11
  33. 20
  34. 4
  35. 32
  36. 43000
  37. 72
  38. 6
  39. 14
  40. 6

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