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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 605 · 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 third proportional to 7 and 14 (that is, 7 : 14 = 14 : ?).
  2. 2.How many factors does 54 have?
  3. 3.7 painters can paint a school in 12 days. How many days would 21 painters take, working at the same speed?
  4. 4.3/8 + 3/9 =
  5. 5.Which is closest to 297 × 21? (Round each number first.) (a) 60000 (b) 6000 (c) 600 (d) 12000
  6. 6.Find the HCF of 35 and 10.
  7. 7.Find the LCM of 10 and 4.
  8. 8.The HCF of two numbers is 5 and their LCM is 70. One of the numbers is 35. What is the other number?
  9. 9.(20 + 11) × 2 − 19 =
  10. 10.50 + 5 × 9 − 14 =
  11. 11.15% of a number is 81. What is the number?
  12. 12.3/6 × 1/12 =
  13. 13.Which of these numbers divides exactly by 8? (a) 9186 (b) 1609 (c) 6361 (d) 1632
  14. 14.Which is closest to 99 + 198 + 196? (a) 700 (b) 500 (c) 600 (d) 400
  15. 15.A hostel has enough food for 7 students for 5 days. How many days will the same food last for 5 students?
  16. 16.A car goes 63 km on 3 litres of petrol. How far can it go on 15 litres (in km)?
  17. 17.A car goes 56 km on 7 litres of petrol. How far can it go on 27 litres (in km)?
  18. 18.Find the LCM of 15, 6 and 9.
  19. 19.Which is closest to 1801 ÷ 31? (a) 30 (b) 600 (c) 60 (d) 120
  20. 20.1/2 of 22 + 2 × 2 =
  21. 21.37.5 ÷ 5 =
  22. 22.Tara takes 45 seconds and Pooja takes 75 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?
  23. 23.What is the smallest number you must add to 770 so that it divides exactly by 3?
  24. 24.8 × (18 − 2) + 16 ÷ 8 =
  25. 25.5 : 10 = 40 : ?
  26. 26.What is 5% of 320?
  27. 27.Find the HCF of 16 and 14.
  28. 28.(12 + 5) × 9 − 1 =
  29. 29.How many factors does 80 have?
  30. 30.Two tanks hold 350 litres and 400 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  31. 31.10 painters can paint a school in 25 days. How many days would 5 painters take, working at the same speed?
  32. 32.Round 61137 to the nearest thousand.
  33. 33.1/5 of 25 + 3 × 5 =
  34. 34.How many factors does 63 have?
  35. 35.What is 25% of 416?
  36. 36.Find the third proportional to 4 and 12 (that is, 4 : 12 = 12 : ?).
  37. 37.What is the smallest number you must add to 108 so that it divides exactly by 13?
  38. 38.Two tanks hold 40 litres and 30 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  39. 39.What is 40% of 495?
  40. 40.Find the LCM of 13, 6 and 4.

Answer key

  1. 28
  2. 8
  3. 4
  4. 17/24
  5. 6000
  6. 5
  7. 20
  8. 10
  9. 43
  10. 81
  11. 540
  12. 1/24
  13. 1632
  14. 500
  15. 7
  16. 315
  17. 216
  18. 90
  19. 60
  20. 15
  21. 7.5
  22. 225
  23. 1
  24. 130
  25. 80
  26. 16
  27. 2
  28. 152
  29. 10
  30. 50
  31. 50
  32. 61000
  33. 20
  34. 6
  35. 104
  36. 36
  37. 9
  38. 10
  39. 198
  40. 156

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