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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 618 · 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.Two tanks hold 60 litres and 80 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  2. 2.The HCF of two numbers is 5 and their LCM is 70. One of the numbers is 10. What is the other number?
  3. 3.How many factors does 14 have?
  4. 4.How many factors does 68 have?
  5. 5.Round 50532 to the nearest ten.
  6. 6.The HCF of two numbers is 5 and their LCM is 120. One of the numbers is 40. What is the other number?
  7. 7.The ratio of boys to girls in a class is 2 : 3. There are 6 boys. How many girls are there?
  8. 8.6.7 × 9 =
  9. 9.Round 18.59 to one decimal place. =
  10. 10.50% of a number is 233. What is the number?
  11. 11.Divide ₹325 between Arjun and Karan in the ratio 4 : 9. How much does Karan get (in ₹)?
  12. 12.Find the third proportional to 5 and 25 (that is, 5 : 25 = 25 : ?).
  13. 13.What is the smallest number you must add to 870 so that it divides exactly by 7?
  14. 14.A car goes 140 km on 7 litres of petrol. How far can it go on 27 litres (in km)?
  15. 15.Which is closest to 901 × 50? (Round each number first.) (a) 90000 (b) 4500 (c) 450000 (d) 45000
  16. 16.The HCF of two numbers is 4 and their LCM is 48. One of the numbers is 12. What is the other number?
  17. 17.What is 5% of 320?
  18. 18.Which is closest to 1605 ÷ 41? (a) 20 (b) 400 (c) 80 (d) 40
  19. 19.If 6 bottles of juice cost ₹234, how much do 9 bottles of juice cost (in ₹)?
  20. 20.The ratio of boys to girls in a class is 3 : 4. There are 9 boys. How many girls are there?
  21. 21.Find the third proportional to 3 and 6 (that is, 3 : 6 = 6 : ?).
  22. 22.Find the LCM of 8, 7 and 14.
  23. 23.What percent of 500 is 70?
  24. 24.The ratio of boys to girls in a class is 2 : 9. There are 18 boys. How many girls are there?
  25. 25.Three temple bells ring every 5, 12 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  26. 26.Which is closest to 600 × 59? (Round each number first.) (a) 360000 (b) 3600 (c) 36000 (d) 72000
  27. 27.If 7 kites cost ₹133, how much do 11 kites cost (in ₹)?
  28. 28.21 − 12 ÷ 4 × 4 =
  29. 29.4 painters can paint a school in 19 days. How many days would 2 painters take, working at the same speed?
  30. 30.Which of these numbers divides exactly by 8? (a) 2268 (b) 1827 (c) 6710 (d) 8296
  31. 31.The HCF of two numbers is 9 and their LCM is 324. One of the numbers is 81. What is the other number?
  32. 32.What is the smallest number you must take away from 281 so that it divides exactly by 3?
  33. 33.8 × (23 − 7) + 64 ÷ 8 =
  34. 34.The HCF of two numbers is 4 and their LCM is 72. One of the numbers is 8. What is the other number?
  35. 35.Find the LCM of 12 and 20.
  36. 36.What is 30% of 420?
  37. 37.54 − 14 ÷ 2 × 5 =
  38. 38.Divide ₹432 between Meera and Saanvi in the ratio 7 : 1. How much does Meera get (in ₹)?
  39. 39.18 ÷ 3 × 2 + 8 =
  40. 40.A hall floor is 480 cm long and 300 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?

Answer key

  1. 20
  2. 35
  3. 4
  4. 6
  5. 50530
  6. 15
  7. 9
  8. 60.3
  9. 18.6
  10. 466
  11. 225
  12. 125
  13. 5
  14. 540
  15. 45000
  16. 16
  17. 16
  18. 40
  19. 351
  20. 12
  21. 12
  22. 56
  23. 14
  24. 81
  25. 120
  26. 36000
  27. 209
  28. 9
  29. 38
  30. 8296
  31. 36
  32. 2
  33. 136
  34. 36
  35. 60
  36. 126
  37. 19
  38. 378
  39. 20
  40. 40

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