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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 60 · 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.What is the smallest number you must take away from 784 so that it divides exactly by 3?
  2. 2.What is the smallest number you must take away from 149 so that it divides exactly by 4?
  3. 3.4/12 + 5/10 =
  4. 4.Which is closest to 898 × 82? (Round each number first.) (a) 144000 (b) 720000 (c) 7200 (d) 72000
  5. 5.12 painters can paint a school in 21 days. How many days would 14 painters take, working at the same speed?
  6. 6.Find the third proportional to 2 and 8 (that is, 2 : 8 = 8 : ?).
  7. 7.20% of a number is 41. What is the number?
  8. 8.25 + 9 × 7 − 1 =
  9. 9.The ratio of boys to girls in a class is 9 : 2. There are 90 boys. How many girls are there?
  10. 10.The HCF of two numbers is 7 and their LCM is 315. One of the numbers is 63. What is the other number?
  11. 11.9 : 12 = 18 : ?
  12. 12.Find the HCF of 77 and 44.
  13. 13.Round 46.07 to one decimal place. =
  14. 14.What is the smallest number you must add to 254 so that it divides exactly by 13?
  15. 15.The HCF of two numbers is 6 and their LCM is 90. One of the numbers is 30. What is the other number?
  16. 16.A hall floor is 125 cm long and 50 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  17. 17.Farhan takes 45 seconds and Sneha 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?
  18. 18.If 6 pencil boxes cost ₹330, how much do 8 pencil boxes cost (in ₹)?
  19. 19.A hostel has enough food for 10 students for 10 days. How many days will the same food last for 20 students?
  20. 20.What is the smallest number you must add to 249 so that it divides exactly by 9?
  21. 21.Find the LCM of 3 and 8.
  22. 22.What is 5/7 of ₹161?
  23. 23.What is 80% of 300?
  24. 24.Two tanks hold 175 litres and 150 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  25. 25.Three temple bells ring every 4, 12 and 30 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  26. 26.What is 150% of 372?
  27. 27.Which is closest to 992 ÷ 49? (a) 10 (b) 200 (c) 40 (d) 20
  28. 28.2 × (25 − 3) + 32 ÷ 8 =
  29. 29.If 4 erasers cost ₹148, how much do 9 erasers cost (in ₹)?
  30. 30.What is 1/2 of 20 kg?
  31. 31.Find the third proportional to 7 and 21 (that is, 7 : 21 = 21 : ?).
  32. 32.What percent of 80 is 12?
  33. 33.Round 72.09 to one decimal place. =
  34. 34.How many factors does 24 have?
  35. 35.If 6 kg of rice costs ₹198, how many kg can you buy for ₹363?
  36. 36.10.4 ÷ 2 =
  37. 37.1/2 × 5/11 =
  38. 38.If 2 kg of rice costs ₹60, how many kg can you buy for ₹180?
  39. 39.52 − 15 ÷ 5 × 5 =
  40. 40.What is the smallest number you must take away from 884 so that it divides exactly by 6?

Answer key

  1. 1
  2. 1
  3. 5/6
  4. 72000
  5. 18
  6. 32
  7. 205
  8. 87
  9. 20
  10. 35
  11. 24
  12. 11
  13. 46.1
  14. 6
  15. 18
  16. 10
  17. 90
  18. 440
  19. 5
  20. 3
  21. 24
  22. 115
  23. 240
  24. 25
  25. 60
  26. 558
  27. 20
  28. 48
  29. 333
  30. 10
  31. 63
  32. 15
  33. 72.1
  34. 8
  35. 11
  36. 5.2
  37. 5/22
  38. 6
  39. 37
  40. 2

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