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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 497 · 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.What is 20% of 310?
  2. 2.What is 3/10 of 220 students?
  3. 3.Which is closest to 394 ÷ 21? (a) 10 (b) 40 (c) 20 (d) 200
  4. 4.6/9 + 3/6 =
  5. 5.The HCF of two numbers is 5 and their LCM is 210. One of the numbers is 30. What is the other number?
  6. 6.30.6 ÷ 6 =
  7. 7.Find the LCM of 7, 8 and 4.
  8. 8.1/3 × 1/4 =
  9. 9.6 painters can paint a school in 30 days. How many days would 18 painters take, working at the same speed?
  10. 10.Two tanks hold 30 litres and 20 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  11. 11.30 + 8 × 3 − 12 =
  12. 12.The HCF of two numbers is 2 and their LCM is 60. One of the numbers is 10. What is the other number?
  13. 13.60 ÷ 5 × 7 + 3 =
  14. 14.Nisha scored 2 marks out of 25 in a test. What percentage did Nisha score?
  15. 15.What is 15% of 160?
  16. 16.Two tanks hold 75 litres and 60 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  17. 17.Find the HCF of 75 and 60.
  18. 18.Which of these numbers divides exactly by 8? (a) 3236 (b) 8579 (c) 5218 (d) 3120
  19. 19.Which is closest to 104 + 895 + 804? (a) 1700 (b) 2000 (c) 1900 (d) 1800
  20. 20.Which is closest to 798 × 78? (Round each number first.) (a) 6400 (b) 640000 (c) 128000 (d) 64000
  21. 21.4 : 8 = 12 : ?
  22. 22.Find the LCM of 11, 3 and 5.
  23. 23.If 4 kites cost ₹20, how much do 15 kites cost (in ₹)?
  24. 24.What is the smallest number you must add to 119 so that it divides exactly by 8?
  25. 25.3 × (11 − 2) + 45 ÷ 5 =
  26. 26.Round 19.43 to one decimal place. =
  27. 27.8 painters can paint a school in 10 days. How many days would 4 painters take, working at the same speed?
  28. 28.What is the smallest number you must take away from 573 so that it divides exactly by 11?
  29. 29.Nisha takes 48 seconds and Dev takes 90 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?
  30. 30.Divide ₹20 between Rohan and Tara in the ratio 3 : 1. How much does Rohan get (in ₹)?
  31. 31.If 4 notebooks cost ₹120, how much do 3 notebooks cost (in ₹)?
  32. 32.The HCF of two numbers is 2 and their LCM is 90. One of the numbers is 10. What is the other number?
  33. 33.20% of a number is 85. What is the number?
  34. 34.The HCF of two numbers is 6 and their LCM is 84. One of the numbers is 42. What is the other number?
  35. 35.Which of these numbers divides exactly by 9? (a) 7854 (b) 8876 (c) 4781 (d) 2772
  36. 36.Find the HCF of 105 and 60.
  37. 37.How many factors does 37 have?
  38. 38.15 ÷ 3 × 4 + 16 =
  39. 39.What is 75% of 424?
  40. 40.How many factors does 20 have?

Answer key

  1. 62
  2. 66
  3. 20
  4. 7/6
  5. 35
  6. 5.1
  7. 56
  8. 1/12
  9. 10
  10. 10
  11. 42
  12. 12
  13. 87
  14. 8
  15. 24
  16. 15
  17. 15
  18. 3120
  19. 1800
  20. 64000
  21. 24
  22. 165
  23. 75
  24. 1
  25. 36
  26. 19.4
  27. 20
  28. 1
  29. 720
  30. 15
  31. 90
  32. 18
  33. 425
  34. 12
  35. 2772
  36. 15
  37. 2
  38. 36
  39. 318
  40. 6

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