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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 621 · 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 ratio of boys to girls in a class is 3 : 8. There are 21 boys. How many girls are there?
  2. 2.What is the smallest number you must take away from 370 so that it divides exactly by 9?
  3. 3.Find the smallest number bigger than 5 that leaves a remainder of 2 when divided by 3, 5 or 4.
  4. 4.Which is closest to 2807 ÷ 41? (a) 140 (b) 700 (c) 70 (d) 35
  5. 5.Round 25.36 to one decimal place. =
  6. 6.The HCF of two numbers is 7 and their LCM is 84. One of the numbers is 28. What is the other number?
  7. 7.Which of these numbers divides exactly by 8? (a) 1590 (b) 9613 (c) 5764 (d) 7160
  8. 8.Round 13687 to the nearest ten.
  9. 9.What is 25% of 252?
  10. 10.What is 12% of 225?
  11. 11.The HCF of two numbers is 4 and their LCM is 168. One of the numbers is 28. What is the other number?
  12. 12.Divide ₹324 between Saanvi and Isha in the ratio 5 : 7. How much does Isha get (in ₹)?
  13. 13.Find the LCM of 10 and 25.
  14. 14.If 10 kites cost ₹520, how much do 18 kites cost (in ₹)?
  15. 15.A hall floor is 280 cm long and 120 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  16. 16.The HCF of two numbers is 7 and their LCM is 245. One of the numbers is 49. What is the other number?
  17. 17.If 4 kg of rice costs ₹348, how many kg can you buy for ₹957?
  18. 18.4/7 of 84 + 3 × 8 =
  19. 19.Which is closest to 1495 ÷ 29? (a) 25 (b) 100 (c) 50 (d) 500
  20. 20.A car goes 16 km on 2 litres of petrol. How far can it go on 9 litres (in km)?
  21. 21.What is the smallest number you must add to 945 so that it divides exactly by 8?
  22. 22.If 4 kites cost ₹20, how much do 17 kites cost (in ₹)?
  23. 23.Divide ₹170 between Isha and Saanvi in the ratio 1 : 9. How much does Isha get (in ₹)?
  24. 24.1/4 of 16 + 3 × 7 =
  25. 25.22 + 7 × 12 − 6 =
  26. 26.What is the smallest number you must add to 575 so that it divides exactly by 8?
  27. 27.Three temple bells ring every 4, 24 and 10 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  28. 28.A hall floor is 175 cm long and 50 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  29. 29.What is the smallest number you must take away from 889 so that it divides exactly by 4?
  30. 30.30 − 12 ÷ 4 × 5 =
  31. 31.5.08 + 7.8 =
  32. 32.30 + 10 × 10 − 5 =
  33. 33.Priya scored 1 marks out of 20 in a test. What percentage did Priya score?
  34. 34.Round 94.44 to one decimal place. =
  35. 35.The ratio of boys to girls in a class is 9 : 1. There are 18 boys. How many girls are there?
  36. 36.A car goes 88 km on 8 litres of petrol. How far can it go on 3 litres (in km)?
  37. 37.Find the LCM of 5 and 4.
  38. 38.7 : 4 = 35 : ?
  39. 39.Find the third proportional to 5 and 25 (that is, 5 : 25 = 25 : ?).
  40. 40.Which is closest to 403 × 90? (Round each number first.) (a) 3600 (b) 72000 (c) 360000 (d) 36000

Answer key

  1. 56
  2. 1
  3. 62
  4. 70
  5. 25.4
  6. 21
  7. 7160
  8. 13690
  9. 63
  10. 27
  11. 24
  12. 189
  13. 50
  14. 936
  15. 21
  16. 35
  17. 11
  18. 72
  19. 50
  20. 72
  21. 7
  22. 85
  23. 17
  24. 25
  25. 100
  26. 1
  27. 120
  28. 14
  29. 1
  30. 15
  31. 12.88
  32. 125
  33. 5
  34. 94.4
  35. 2
  36. 33
  37. 20
  38. 20
  39. 125
  40. 36000

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