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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 961 · 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 21 and 15.
  2. 2.How many factors does 32 have?
  3. 3.What is the smallest number you must add to 193 so that it divides exactly by 6?
  4. 4.What is the smallest number you must take away from 419 so that it divides exactly by 4?
  5. 5.Find the LCM of 10, 11 and 5.
  6. 6.31.5 ÷ 9 =
  7. 7.Which of these numbers divides exactly by 9? (a) 9556 (b) 1991 (c) 7317 (d) 1024
  8. 8.Saanvi takes 60 seconds and Karan 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?
  9. 9.Two tanks hold 160 litres and 200 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  10. 10.5% of a number is 10. What is the number?
  11. 11.Round 39257 to the nearest thousand.
  12. 12.Divide ₹504 between Kabir and Aarav in the ratio 2 : 7. How much does Aarav get (in ₹)?
  13. 13.Find the third proportional to 7 and 14 (that is, 7 : 14 = 14 : ?).
  14. 14.Find the LCM of 15 and 6.
  15. 15.If 9 pencil boxes cost ₹243, how much do 6 pencil boxes cost (in ₹)?
  16. 16.How many factors does 41 have?
  17. 17.56.4 ÷ 6 =
  18. 18.Kabir takes 90 seconds and Tara takes 50 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?
  19. 19.If 9 kg of rice costs ₹261, how many kg can you buy for ₹406?
  20. 20.Which is closest to 504 × 60? (Round each number first.) (a) 3000 (b) 300000 (c) 60000 (d) 30000
  21. 21.If 11 erasers cost ₹165, how much do 14 erasers cost (in ₹)?
  22. 22.What is the smallest number you must add to 865 so that it divides exactly by 11?
  23. 23.8 × (15 − 13) + 60 ÷ 5 =
  24. 24.Aarav scored 20 marks out of 80 in a test. What percentage did Aarav score?
  25. 25.The HCF of two numbers is 9 and their LCM is 378. One of the numbers is 54. What is the other number?
  26. 26.Divide ₹25 between Manav and Aarav in the ratio 3 : 2. How much does Manav get (in ₹)?
  27. 27.Which is closest to 304 × 19? (Round each number first.) (a) 60000 (b) 600 (c) 12000 (d) 6000
  28. 28.The ratio of boys to girls in a class is 3 : 1. There are 21 boys. How many girls are there?
  29. 29.1/2 − 1/8 =
  30. 30.25% of a number is 101. What is the number?
  31. 31.3 painters can paint a school in 4 days. How many days would 2 painters take, working at the same speed?
  32. 32.Write 3/4 as a percent.
  33. 33.Find the LCM of 7, 4 and 2.
  34. 34.2 × (22 − 12) + 35 ÷ 5 =
  35. 35.21 − 8 ÷ 4 × 5 =
  36. 36.Find the smallest number bigger than 12 that leaves a remainder of 1 when divided by 4, 6 or 12.
  37. 37.Find the HCF of 72 and 56.
  38. 38.The ratio of boys to girls in a class is 1 : 6. There are 8 boys. How many girls are there?
  39. 39.5/6 of 48 + 8 × 7 =
  40. 40.Three temple bells ring every 24, 12 and 9 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?

Answer key

  1. 105
  2. 6
  3. 5
  4. 3
  5. 110
  6. 3.5
  7. 7317
  8. 540
  9. 40
  10. 200
  11. 39000
  12. 392
  13. 28
  14. 30
  15. 162
  16. 2
  17. 9.4
  18. 450
  19. 14
  20. 30000
  21. 210
  22. 4
  23. 28
  24. 25
  25. 63
  26. 15
  27. 6000
  28. 7
  29. 3/8
  30. 404
  31. 6
  32. 75
  33. 28
  34. 27
  35. 11
  36. 13
  37. 8
  38. 48
  39. 96
  40. 72

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