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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 806 · 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.A hall floor is 360 cm long and 300 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  2. 2.Find the LCM of 15, 3 and 10.
  3. 3.Find the third proportional to 5 and 20 (that is, 5 : 20 = 20 : ?).
  4. 4.What is 2/3 of 78 km?
  5. 5.(12 + 17) × 4 − 18 =
  6. 6.Find the HCF of 50 and 20.
  7. 7.What is the smallest number you must take away from 466 so that it divides exactly by 3?
  8. 8.Divide ₹203 between Priya and Kavya in the ratio 4 : 3. How much does Kavya get (in ₹)?
  9. 9.What is the smallest number you must take away from 683 so that it divides exactly by 4?
  10. 10.1/8 + 1/2 =
  11. 11.Find the LCM of 16 and 12.
  12. 12.8 × (20 − 17) + 6 ÷ 2 =
  13. 13.Three temple bells ring every 5, 8 and 6 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  14. 14.Divide ₹294 between Zoya and Priya in the ratio 2 : 5. How much does Zoya get (in ₹)?
  15. 15.12 ÷ 4 × 6 + 4 =
  16. 16.(16 + 6) × 2 − 5 =
  17. 17.What is the smallest number you must add to 395 so that it divides exactly by 3?
  18. 18.What is 10% of 170?
  19. 19.A hall floor is 125 cm long and 100 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  20. 20.Three temple bells ring every 12, 10 and 5 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  21. 21.Manav takes 30 seconds and Rahul takes 45 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?
  22. 22.Three temple bells ring every 5, 20 and 15 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  23. 23.What is the smallest number you must add to 646 so that it divides exactly by 9?
  24. 24.The HCF of two numbers is 5 and their LCM is 70. One of the numbers is 35. What is the other number?
  25. 25.3/9 × 1/12 =
  26. 26.The HCF of two numbers is 6 and their LCM is 336. One of the numbers is 48. What is the other number?
  27. 27.The HCF of two numbers is 2 and their LCM is 24. One of the numbers is 8. What is the other number?
  28. 28.53 − 42 ÷ 6 × 4 =
  29. 29.9.5 × 4 =
  30. 30.How many factors does 17 have?
  31. 31.44 + 11 × 5 − 5 =
  32. 32.Which of these numbers divides exactly by 3? (a) 5081 (b) 6104 (c) 1692 (d) 4343
  33. 33.1/2 × 2/5 =
  34. 34.7.5 × 4 =
  35. 35.Find the HCF of 54 and 30.
  36. 36.Which is closest to 602 + 397 + 400? (a) 1500 (b) 1300 (c) 1400 (d) 1600
  37. 37.Divide ₹33 between Zoya and Ishaan in the ratio 2 : 1. How much does Zoya get (in ₹)?
  38. 38.Two tanks hold 80 litres and 30 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  39. 39.3/6 × 2/3 =
  40. 40.Which is closest to 702 + 498 + 304? (a) 1600 (b) 1500 (c) 1700 (d) 1400

Answer key

  1. 30
  2. 30
  3. 80
  4. 52
  5. 98
  6. 10
  7. 1
  8. 87
  9. 3
  10. 5/8
  11. 48
  12. 27
  13. 120
  14. 84
  15. 22
  16. 39
  17. 1
  18. 17
  19. 20
  20. 60
  21. 90
  22. 60
  23. 2
  24. 10
  25. 1/36
  26. 42
  27. 6
  28. 25
  29. 38
  30. 2
  31. 94
  32. 1692
  33. 1/5
  34. 30
  35. 6
  36. 1400
  37. 22
  38. 10
  39. 1/3
  40. 1500

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