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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 601 · 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.What is the smallest number you must add to 397 so that it divides exactly by 6?
  2. 2.What is the smallest number you must take away from 592 so that it divides exactly by 12?
  3. 3.Which of these numbers divides exactly by 3? (a) 5885 (b) 4401 (c) 9350 (d) 5267
  4. 4.If 6 kites cost ₹72, how much do 8 kites cost (in ₹)?
  5. 5.1/2 of 22 + 7 × 2 =
  6. 6.5/8 − 3/10 =
  7. 7.Which of these numbers divides exactly by 3? (a) 1708 (b) 2305 (c) 9743 (d) 5217
  8. 8.Find the HCF of 21 and 18.
  9. 9.If 4 pencil boxes cost ₹76, how much do 19 pencil boxes cost (in ₹)?
  10. 10.Find the HCF of 33 and 77.
  11. 11.6 : 13 = 36 : ?
  12. 12.What is 30% of 330?
  13. 13.Find the LCM of 5 and 7.
  14. 14.10 + 7 × 3 − 1 =
  15. 15.7 painters can paint a school in 10 days. How many days would 10 painters take, working at the same speed?
  16. 16.Which is closest to 502 × 29? (Round each number first.) (a) 150000 (b) 15000 (c) 30000 (d) 1500
  17. 17.Two tanks hold 100 litres and 140 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  18. 18.Two tanks hold 15 litres and 35 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  19. 19.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?
  20. 20.Find the LCM of 8, 12 and 7.
  21. 21.8/9 of 36 + 5 × 8 =
  22. 22.Round 69561 to the nearest thousand.
  23. 23.The HCF of two numbers is 3 and their LCM is 54. One of the numbers is 6. What is the other number?
  24. 24.3 : 5 = 21 : ?
  25. 25.If 6 kg of rice costs ₹480, how many kg can you buy for ₹160?
  26. 26.12 : 4 = 72 : ?
  27. 27.The HCF of two numbers is 8 and their LCM is 192. One of the numbers is 64. What is the other number?
  28. 28.What is 3/8 of ₹64?
  29. 29.(20 + 16) × 2 − 1 =
  30. 30.10 : 3 = 90 : ?
  31. 31.Two tanks hold 120 litres and 80 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  32. 32.1/3 + 2/7 =
  33. 33.The HCF of two numbers is 2 and their LCM is 56. One of the numbers is 8. What is the other number?
  34. 34.2.82 + 7.1 =
  35. 35.Divide ₹649 between Dev and Isha in the ratio 9 : 2. How much does Dev get (in ₹)?
  36. 36.The HCF of two numbers is 3 and their LCM is 120. One of the numbers is 15. What is the other number?
  37. 37.Divide ₹132 between Ishaan and Aditya in the ratio 2 : 1. How much does Aditya get (in ₹)?
  38. 38.Round 24147 to the nearest hundred.
  39. 39.Find the LCM of 4, 3 and 7.
  40. 40.Find the third proportional to 7 and 35 (that is, 7 : 35 = 35 : ?).

Answer key

  1. 5
  2. 4
  3. 4401
  4. 96
  5. 25
  6. 13/40
  7. 5217
  8. 3
  9. 361
  10. 11
  11. 78
  12. 99
  13. 35
  14. 30
  15. 7
  16. 15000
  17. 20
  18. 5
  19. 120
  20. 168
  21. 72
  22. 70000
  23. 27
  24. 35
  25. 2
  26. 24
  27. 24
  28. 24
  29. 71
  30. 27
  31. 40
  32. 13/21
  33. 14
  34. 9.92
  35. 531
  36. 24
  37. 44
  38. 24100
  39. 84
  40. 175

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