← Practice: number skills lesson New set →

Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 536 · 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 18 (that is, 6 : 18 = 18 : ?).
  2. 2.Find the LCM of 3, 5 and 15.
  3. 3.Round 89153 to the nearest ten.
  4. 4.Round 4190 to the nearest hundred.
  5. 5.10% of a number is 10. What is the number?
  6. 6.If 3 pens cost ₹75, how much do 11 pens cost (in ₹)?
  7. 7.9 : 7 = 36 : ?
  8. 8.What is the smallest number you must take away from 272 so that it divides exactly by 3?
  9. 9.What is 150% of 140?
  10. 10.16 ÷ 8 × 3 + 10 =
  11. 11.Find the HCF of 30 and 48.
  12. 12.Three temple bells ring every 30, 15 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  13. 13.Three temple bells ring every 30, 18 and 5 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  14. 14.Divide ₹912 between Isha and Saanvi in the ratio 9 : 7. How much does Saanvi get (in ₹)?
  15. 15.How many factors does 76 have?
  16. 16.Two tanks hold 250 litres and 200 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  17. 17.The HCF of two numbers is 4 and their LCM is 72. One of the numbers is 36. What is the other number?
  18. 18.Write 1/2 as a percent.
  19. 19.Find the LCM of 12, 10 and 3.
  20. 20.Two tanks hold 125 litres and 175 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  21. 21.What is the smallest number you must take away from 759 so that it divides exactly by 8?
  22. 22.Which is closest to 801 × 40? (Round each number first.) (a) 3200 (b) 64000 (c) 32000 (d) 320000
  23. 23.A car goes 96 km on 8 litres of petrol. How far can it go on 17 litres (in km)?
  24. 24.Find the third proportional to 6 and 30 (that is, 6 : 30 = 30 : ?).
  25. 25.A hall floor is 315 cm long and 225 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  26. 26.What is the smallest number you must take away from 305 so that it divides exactly by 6?
  27. 27.Find the HCF of 6 and 15.
  28. 28.Two tanks hold 180 litres and 225 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  29. 29.If 4 kg of rice costs ₹212, how many kg can you buy for ₹742?
  30. 30.7/12 × 9/11 =
  31. 31.The ratio of boys to girls in a class is 9 : 2. There are 36 boys. How many girls are there?
  32. 32.Pooja scored 19 marks out of 25 in a test. What percentage did Pooja score?
  33. 33.What is 25% of 48?
  34. 34.Find the LCM of 12, 3 and 5.
  35. 35.The ratio of boys to girls in a class is 6 : 1. There are 24 boys. How many girls are there?
  36. 36.The ratio of boys to girls in a class is 7 : 6. There are 56 boys. How many girls are there?
  37. 37.The HCF of two numbers is 2 and their LCM is 20. One of the numbers is 4. What is the other number?
  38. 38.Find the smallest number bigger than 15 that leaves a remainder of 1 when divided by 4, 15 or 6.
  39. 39.How many factors does 31 have?
  40. 40.Find the HCF of 40 and 48.

Answer key

  1. 54
  2. 15
  3. 89150
  4. 4200
  5. 100
  6. 275
  7. 28
  8. 2
  9. 210
  10. 16
  11. 6
  12. 120
  13. 90
  14. 399
  15. 6
  16. 50
  17. 8
  18. 50
  19. 60
  20. 25
  21. 7
  22. 32000
  23. 204
  24. 150
  25. 35
  26. 5
  27. 3
  28. 45
  29. 14
  30. 21/44
  31. 8
  32. 76
  33. 12
  34. 60
  35. 4
  36. 48
  37. 10
  38. 61
  39. 2
  40. 8

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude