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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 831 · 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.The HCF of two numbers is 3 and their LCM is 60. One of the numbers is 15. What is the other number?
  2. 2.48 + 8 × 7 − 6 =
  3. 3.1/5 of 15 + 8 × 4 =
  4. 4.How many factors does 48 have?
  5. 5.If 4 pens cost ₹56, how much do 11 pens cost (in ₹)?
  6. 6.What is the smallest number you must add to 215 so that it divides exactly by 7?
  7. 7.Find the LCM of 6 and 15.
  8. 8.What is 25% of 536?
  9. 9.A hall floor is 200 cm long and 80 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  10. 10.Rohan takes 90 seconds and Rahul 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?
  11. 11.12 : 3 = 96 : ?
  12. 12.Find the HCF of 26 and 117.
  13. 13.What is the smallest number you must add to 231 so that it divides exactly by 12?
  14. 14.What is the smallest number you must take away from 206 so that it divides exactly by 9?
  15. 15.Ishaan takes 40 seconds and Zoya takes 90 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?
  16. 16.Write 3/10 as a percent.
  17. 17.7.6 × 2 =
  18. 18.Round 50867 to the nearest ten.
  19. 19.The ratio of boys to girls in a class is 1 : 4. There are 9 boys. How many girls are there?
  20. 20.6/8 − 3/7 =
  21. 21.Find the smallest number bigger than 9 that leaves a remainder of 1 when divided by 5, 9 or 3.
  22. 22.Find the smallest number bigger than 9 that leaves a remainder of 2 when divided by 3, 9 or 5.
  23. 23.Find the HCF of 90 and 70.
  24. 24.Three temple bells ring every 30, 9 and 5 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  25. 25.Find the third proportional to 7 and 21 (that is, 7 : 21 = 21 : ?).
  26. 26.Find the third proportional to 6 and 18 (that is, 6 : 18 = 18 : ?).
  27. 27.What percent of 40 is 6?
  28. 28.Find the HCF of 56 and 64.
  29. 29.Which is closest to 297 + 297 + 205? (a) 900 (b) 1000 (c) 800 (d) 700
  30. 30.The HCF of two numbers is 9 and their LCM is 162. One of the numbers is 81. What is the other number?
  31. 31.28 ÷ 7 × 7 + 13 =
  32. 32.4/5 + 1/7 =
  33. 33.Isha takes 36 seconds and Vivaan 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?
  34. 34.If 7 pencil boxes cost ₹70, how much do 8 pencil boxes cost (in ₹)?
  35. 35.7 : 10 = 21 : ?
  36. 36.38 + 7 × 5 − 6 =
  37. 37.A car goes 80 km on 4 litres of petrol. How far can it go on 32 litres (in km)?
  38. 38.Find the smallest number bigger than 8 that leaves a remainder of 3 when divided by 8, 6 or 4.
  39. 39.Tara takes 72 seconds and Meera 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?
  40. 40.Find the smallest number bigger than 15 that leaves a remainder of 2 when divided by 12, 15 or 4.

Answer key

  1. 12
  2. 98
  3. 35
  4. 10
  5. 154
  6. 2
  7. 30
  8. 134
  9. 10
  10. 270
  11. 24
  12. 13
  13. 9
  14. 8
  15. 360
  16. 30
  17. 15.2
  18. 50870
  19. 36
  20. 9/28
  21. 46
  22. 47
  23. 10
  24. 90
  25. 63
  26. 54
  27. 15
  28. 8
  29. 800
  30. 18
  31. 41
  32. 33/35
  33. 108
  34. 80
  35. 30
  36. 67
  37. 640
  38. 27
  39. 360
  40. 62

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