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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 885 · 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. 1.6.51 + 6.2 =
  2. 2.Find the LCM of 5, 10 and 4.
  3. 3.3/4 + 2/8 =
  4. 4.2 : 5 = 4 : ?
  5. 5.Three temple bells ring every 20, 30 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  6. 6.4/8 + 6/7 =
  7. 7.Find the smallest number bigger than 15 that leaves a remainder of 1 when divided by 15, 12 or 10.
  8. 8.Two tanks hold 135 litres and 60 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  9. 9.The HCF of two numbers is 8 and their LCM is 504. One of the numbers is 72. What is the other number?
  10. 10.What is the smallest number you must take away from 373 so that it divides exactly by 4?
  11. 11.15% of a number is 3. What is the number?
  12. 12.Find the third proportional to 8 and 16 (that is, 8 : 16 = 16 : ?).
  13. 13.The ratio of boys to girls in a class is 8 : 7. There are 40 boys. How many girls are there?
  14. 14.Divide ₹611 between Aditya and Sneha in the ratio 9 : 4. How much does Aditya get (in ₹)?
  15. 15.What is the smallest number you must add to 519 so that it divides exactly by 13?
  16. 16.Find the third proportional to 9 and 27 (that is, 9 : 27 = 27 : ?).
  17. 17.Dev takes 48 seconds and Kabir 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?
  18. 18.2 : 13 = 18 : ?
  19. 19.What is the smallest number you must add to 539 so that it divides exactly by 4?
  20. 20.A hall floor is 240 cm long and 90 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  21. 21.Find the HCF of 45 and 20.
  22. 22.The HCF of two numbers is 9 and their LCM is 567. One of the numbers is 81. What is the other number?
  23. 23.Which of these numbers divides exactly by 4? (a) 4192 (b) 5593 (c) 6637 (d) 5351
  24. 24.Aarav takes 45 seconds and Zoya takes 54 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?
  25. 25.Find the HCF of 24 and 40.
  26. 26.Find the HCF of 18 and 16.
  27. 27.Which is closest to 604 × 50? (Round each number first.) (a) 30000 (b) 3000 (c) 60000 (d) 300000
  28. 28.Divide ₹360 between Dev and Priya in the ratio 1 : 8. How much does Dev get (in ₹)?
  29. 29.What is 2/3 of 87 students?
  30. 30.6 : 9 = 48 : ?
  31. 31.20% of a number is 110. What is the number?
  32. 32.Round 66741 to the nearest thousand.
  33. 33.Round 98.68 to one decimal place. =
  34. 34.8 painters can paint a school in 24 days. How many days would 16 painters take, working at the same speed?
  35. 35.Which of these numbers divides exactly by 9? (a) 7541 (b) 4855 (c) 3456 (d) 4606
  36. 36.Divide ₹75 between Dev and Saanvi in the ratio 7 : 8. How much does Saanvi get (in ₹)?
  37. 37.Which is closest to 796 ÷ 19? (a) 80 (b) 20 (c) 400 (d) 40
  38. 38.15% of a number is 84. What is the number?
  39. 39.4 : 9 = 12 : ?
  40. 40.Two tanks hold 225 litres and 135 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?

Answer key

  1. 12.71
  2. 20
  3. 1
  4. 10
  5. 120
  6. 19/14
  7. 61
  8. 15
  9. 56
  10. 1
  11. 20
  12. 32
  13. 35
  14. 423
  15. 1
  16. 81
  17. 720
  18. 117
  19. 1
  20. 24
  21. 5
  22. 63
  23. 4192
  24. 270
  25. 8
  26. 2
  27. 30000
  28. 40
  29. 58
  30. 72
  31. 550
  32. 67000
  33. 98.7
  34. 12
  35. 3456
  36. 40
  37. 40
  38. 560
  39. 27
  40. 45

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