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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 985 · 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.Write 9/25 as a percent.
  2. 2.8 painters can paint a school in 26 days. How many days would 16 painters take, working at the same speed?
  3. 3.Which is closest to 904 × 21? (Round each number first.) (a) 36000 (b) 180000 (c) 18000 (d) 1800
  4. 4.Which is closest to 196 × 61? (Round each number first.) (a) 120000 (b) 1200 (c) 24000 (d) 12000
  5. 5.The HCF of two numbers is 2 and their LCM is 60. One of the numbers is 12. What is the other number?
  6. 6.Which is closest to 593 ÷ 19? (a) 15 (b) 30 (c) 300 (d) 60
  7. 7.Pooja takes 60 seconds and Kavya takes 75 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?
  8. 8.24 ÷ 3 × 2 + 6 =
  9. 9.Aarav takes 72 seconds and Aditya takes 40 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?
  10. 10.How many factors does 39 have?
  11. 11.Round 70.84 to one decimal place. =
  12. 12.Find the third proportional to 4 and 16 (that is, 4 : 16 = 16 : ?).
  13. 13.A hostel has enough food for 8 students for 15 days. How many days will the same food last for 15 students?
  14. 14.Two tanks hold 315 litres and 90 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  15. 15.Which of these numbers divides exactly by 9? (a) 8962 (b) 2418 (c) 1253 (d) 1881
  16. 16.(8 + 5) × 2 − 19 =
  17. 17.Three temple bells ring every 18, 6 and 4 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  18. 18.Which of these numbers divides exactly by 4? (a) 4511 (b) 5398 (c) 4716 (d) 6363
  19. 19.47 − 64 ÷ 8 × 4 =
  20. 20.Find the LCM of 36 and 16.
  21. 21.Rahul scored 17 marks out of 25 in a test. What percentage did Rahul score?
  22. 22.9/10 + 6/7 =
  23. 23.If 4 notebooks cost ₹76, how much do 12 notebooks cost (in ₹)?
  24. 24.Find the LCM of 3, 7 and 11.
  25. 25.What is the smallest number you must add to 372 so that it divides exactly by 9?
  26. 26.The ratio of boys to girls in a class is 7 : 1. There are 14 boys. How many girls are there?
  27. 27.What is the smallest number you must add to 105 so that it divides exactly by 11?
  28. 28.A hall floor is 315 cm long and 90 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  29. 29.2/12 × 2/3 =
  30. 30.(4 + 14) × 9 − 8 =
  31. 31.A hostel has enough food for 12 students for 11 days. How many days will the same food last for 11 students?
  32. 32.How many factors does 27 have?
  33. 33.Which is closest to 197 × 51? (Round each number first.) (a) 1000 (b) 100000 (c) 10000 (d) 20000
  34. 34.6/8 + 5/6 =
  35. 35.Diya scored 16 marks out of 20 in a test. What percentage did Diya score?
  36. 36.What is the smallest number you must add to 759 so that it divides exactly by 6?
  37. 37.Find the LCM of 5, 7 and 6.
  38. 38.If 10 notebooks cost ₹600, how much do 17 notebooks cost (in ₹)?
  39. 39.1/2 − 1/3 =
  40. 40.What percent of 200 is 146?

Answer key

  1. 36
  2. 13
  3. 18000
  4. 12000
  5. 10
  6. 30
  7. 300
  8. 22
  9. 360
  10. 4
  11. 70.8
  12. 64
  13. 8
  14. 45
  15. 1881
  16. 7
  17. 36
  18. 4716
  19. 15
  20. 144
  21. 68
  22. 123/70
  23. 228
  24. 231
  25. 6
  26. 2
  27. 5
  28. 14
  29. 1/9
  30. 154
  31. 12
  32. 4
  33. 10000
  34. 19/12
  35. 80
  36. 3
  37. 210
  38. 1020
  39. 1/6
  40. 73

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