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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 763 · 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.Find the third proportional to 6 and 12 (that is, 6 : 12 = 12 : ?).
  2. 2.Vivaan takes 50 seconds and Tara takes 30 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?
  3. 3.Three temple bells ring every 18, 5 and 10 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  4. 4.Which of these numbers divides exactly by 4? (a) 8416 (b) 8497 (c) 7466 (d) 3994
  5. 5.10 painters can paint a school in 4 days. How many days would 20 painters take, working at the same speed?
  6. 6.9 × (16 − 6) + 72 ÷ 8 =
  7. 7.What is the smallest number you must add to 717 so that it divides exactly by 12?
  8. 8.Find the HCF of 21 and 56.
  9. 9.3.89 + 2.4 =
  10. 10.Find the LCM of 18 and 24.
  11. 11.Which of these numbers divides exactly by 4? (a) 3063 (b) 6170 (c) 1480 (d) 2793
  12. 12.1/3 + 2/4 =
  13. 13.Find the LCM of 9, 4 and 15.
  14. 14.8.34 + 1.7 =
  15. 15.Which is closest to 697 × 20? (Round each number first.) (a) 1400 (b) 28000 (c) 14000 (d) 140000
  16. 16.23 + 10 × 5 − 21 =
  17. 17.2/3 − 6/10 =
  18. 18.Round 57828 to the nearest hundred.
  19. 19.Three temple bells ring every 6, 5 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  20. 20.Write 9/10 as a percent.
  21. 21.Kabir takes 40 seconds and Ishaan 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?
  22. 22.4 × (18 − 2) + 35 ÷ 5 =
  23. 23.30 ÷ 5 × 7 + 21 =
  24. 24.How many factors does 53 have?
  25. 25.(14 + 17) × 2 − 2 =
  26. 26.Find the third proportional to 3 and 15 (that is, 3 : 15 = 15 : ?).
  27. 27.1/2 × 2/5 =
  28. 28.Find the LCM of 12 and 32.
  29. 29.Find the HCF of 72 and 27.
  30. 30.11 : 6 = 88 : ?
  31. 31.Find the HCF of 10 and 8.
  32. 32.Round 29045 to the nearest hundred.
  33. 33.21 ÷ 7 × 6 + 4 =
  34. 34.Aditya scored 7 marks out of 50 in a test. What percentage did Aditya score?
  35. 35.Find the HCF of 24 and 32.
  36. 36.Which is closest to 2394 ÷ 39? (a) 120 (b) 30 (c) 600 (d) 60
  37. 37.The ratio of boys to girls in a class is 2 : 7. There are 8 boys. How many girls are there?
  38. 38.A hall floor is 420 cm long and 180 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  39. 39.5/8 of 48 + 8 × 9 =
  40. 40.Two tanks hold 20 litres and 45 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?

Answer key

  1. 24
  2. 150
  3. 90
  4. 8416
  5. 2
  6. 99
  7. 3
  8. 7
  9. 6.29
  10. 72
  11. 1480
  12. 5/6
  13. 180
  14. 10.04
  15. 14000
  16. 52
  17. 1/15
  18. 57800
  19. 120
  20. 90
  21. 120
  22. 71
  23. 63
  24. 2
  25. 60
  26. 75
  27. 1/5
  28. 96
  29. 9
  30. 48
  31. 2
  32. 29000
  33. 22
  34. 14
  35. 8
  36. 60
  37. 28
  38. 21
  39. 102
  40. 5

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