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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 351 · 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 LCM of 5, 7 and 4.
  2. 2.What percent of 20 is 8?
  3. 3.5/8 + 2/4 =
  4. 4.Round 20944 to the nearest thousand.
  5. 5.Find the LCM of 4, 5 and 9.
  6. 6.What is the smallest number you must take away from 855 so that it divides exactly by 8?
  7. 7.80% of a number is 72. What is the number?
  8. 8.Zoya scored 20 marks out of 40 in a test. What percentage did Zoya score?
  9. 9.24.9 ÷ 3 =
  10. 10.Two tanks hold 40 litres and 140 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  11. 11.How many factors does 78 have?
  12. 12.What is the smallest number you must take away from 346 so that it divides exactly by 11?
  13. 13.Saanvi takes 30 seconds and Rohan takes 54 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?
  14. 14.A car goes 216 km on 12 litres of petrol. How far can it go on 28 litres (in km)?
  15. 15.What is 20% of 35?
  16. 16.Find the LCM of 9 and 5.
  17. 17.Find the LCM of 15 and 21.
  18. 18.The ratio of boys to girls in a class is 7 : 3. There are 56 boys. How many girls are there?
  19. 19.The HCF of two numbers is 2 and their LCM is 144. One of the numbers is 16. What is the other number?
  20. 20.8 : 7 = 40 : ?
  21. 21.Find the third proportional to 9 and 45 (that is, 9 : 45 = 45 : ?).
  22. 22.20% of a number is 69. What is the number?
  23. 23.Which is closest to 299 + 595 + 198? (a) 1100 (b) 1200 (c) 1300 (d) 1000
  24. 24.Write 9/25 as a percent.
  25. 25.Two tanks hold 80 litres and 360 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  26. 26.Zoya takes 54 seconds and Tara takes 45 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?
  27. 27.A car goes 42 km on 3 litres of petrol. How far can it go on 30 litres (in km)?
  28. 28.Round 34573 to the nearest ten.
  29. 29.11.2 ÷ 8 =
  30. 30.2 painters can paint a school in 5 days. How many days would 5 painters take, working at the same speed?
  31. 31.45 ÷ 9 × 9 + 8 =
  32. 32.What is 1/3 of 12 km?
  33. 33.30 + 6 × 12 − 15 =
  34. 34.Divide ₹399 between Manav and Meera in the ratio 1 : 6. How much does Manav get (in ₹)?
  35. 35.What is the smallest number you must add to 530 so that it divides exactly by 12?
  36. 36.If 3 mangoes cost ₹147, how much do 15 mangoes cost (in ₹)?
  37. 37.9.6 ÷ 3 =
  38. 38.Find the third proportional to 9 and 18 (that is, 9 : 18 = 18 : ?).
  39. 39.Which of these numbers divides exactly by 9? (a) 2396 (b) 5157 (c) 5744 (d) 7901
  40. 40.Pooja takes 40 seconds and Priya takes 36 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?

Answer key

  1. 140
  2. 40
  3. 9/8
  4. 21000
  5. 180
  6. 7
  7. 90
  8. 50
  9. 8.3
  10. 20
  11. 8
  12. 5
  13. 270
  14. 504
  15. 7
  16. 45
  17. 105
  18. 24
  19. 18
  20. 35
  21. 225
  22. 345
  23. 1100
  24. 36
  25. 40
  26. 270
  27. 420
  28. 34570
  29. 1.4
  30. 2
  31. 53
  32. 4
  33. 87
  34. 57
  35. 10
  36. 735
  37. 3.2
  38. 36
  39. 5157
  40. 360

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