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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 650 · 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 5 and 25 (that is, 5 : 25 = 25 : ?).
  2. 2.Two tanks hold 120 litres and 160 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  3. 3.What is 25% of 576?
  4. 4.If 10 erasers cost ₹440, how much do 3 erasers cost (in ₹)?
  5. 5.20% of a number is 17. What is the number?
  6. 6.Find the HCF of 70 and 56.
  7. 7.6/12 + 1/2 =
  8. 8.Find the LCM of 7 and 2.
  9. 9.Divide ₹611 between Aditya and Priya in the ratio 9 : 4. How much does Aditya get (in ₹)?
  10. 10.Divide ₹605 between Karan and Zoya in the ratio 2 : 9. How much does Zoya get (in ₹)?
  11. 11.The ratio of boys to girls in a class is 4 : 9. There are 24 boys. How many girls are there?
  12. 12.The HCF of two numbers is 3 and their LCM is 30. One of the numbers is 6. What is the other number?
  13. 13.11 painters can paint a school in 13 days. How many days would 13 painters take, working at the same speed?
  14. 14.Three temple bells ring every 15, 5 and 24 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  15. 15.Which is closest to 502 + 196 + 201? (a) 800 (b) 900 (c) 1100 (d) 1000
  16. 16.44 − 27 ÷ 9 × 9 =
  17. 17.2/5 − 1/6 =
  18. 18.What is 2/7 of 98 students?
  19. 19.Three temple bells ring every 9, 8 and 4 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  20. 20.8 painters can paint a school in 13 days. How many days would 2 painters take, working at the same speed?
  21. 21.Three temple bells ring every 6, 10 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  22. 22.Sneha takes 36 seconds and Ananya 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?
  23. 23.48 + 4 × 5 − 13 =
  24. 24.A hall floor is 210 cm long and 180 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  25. 25.What is 20% of 170?
  26. 26.If 3 cricket balls cost ₹102, how much do 19 cricket balls cost (in ₹)?
  27. 27.27.9 ÷ 3 =
  28. 28.Write 3/10 as a percent.
  29. 29.4/11 − 1/3 =
  30. 30.If 9 bottles of juice cost ₹171, how much do 11 bottles of juice cost (in ₹)?
  31. 31.1/5 + 1/6 =
  32. 32.Find the HCF of 35 and 21.
  33. 33.Three temple bells ring every 18, 12 and 24 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  34. 34.48 + 4 × 2 − 41 =
  35. 35.Find the LCM of 5, 8 and 10.
  36. 36.Write 1/2 as a percent.
  37. 37.Find the third proportional to 4 and 16 (that is, 4 : 16 = 16 : ?).
  38. 38.40% of a number is 106. What is the number?
  39. 39.If 4 pencil boxes cost ₹76, how much do 16 pencil boxes cost (in ₹)?
  40. 40.1/12 × 2/7 =

Answer key

  1. 125
  2. 40
  3. 144
  4. 132
  5. 85
  6. 14
  7. 1
  8. 14
  9. 423
  10. 495
  11. 54
  12. 15
  13. 11
  14. 120
  15. 900
  16. 17
  17. 7/30
  18. 28
  19. 72
  20. 52
  21. 120
  22. 180
  23. 55
  24. 42
  25. 34
  26. 646
  27. 9.3
  28. 30
  29. 1/33
  30. 209
  31. 11/30
  32. 7
  33. 72
  34. 15
  35. 40
  36. 50
  37. 64
  38. 265
  39. 304
  40. 1/42

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