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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 640 · 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 smallest number bigger than 15 that leaves a remainder of 2 when divided by 15, 4 or 10.
  2. 2.How many factors does 74 have?
  3. 3.Find the LCM of 5, 4 and 9.
  4. 4.20% of a number is 21. What is the number?
  5. 5.Round 68.77 to one decimal place. =
  6. 6.How many factors does 67 have?
  7. 7.A hostel has enough food for 7 students for 25 days. How many days will the same food last for 5 students?
  8. 8.59 − 24 ÷ 8 × 9 =
  9. 9.Which of these numbers divides exactly by 8? (a) 1848 (b) 1085 (c) 1422 (d) 4094
  10. 10.Saanvi takes 48 seconds and Kavya takes 72 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?
  11. 11.If 10 pencil boxes cost ₹100, how much do 4 pencil boxes cost (in ₹)?
  12. 12.10/11 − 4/10 =
  13. 13.Three temple bells ring every 18, 24 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  14. 14.2.9 × 8 =
  15. 15.Three temple bells ring every 30, 24 and 20 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  16. 16.Which is closest to 203 × 41? (Round each number first.) (a) 8000 (b) 80000 (c) 16000 (d) 800
  17. 17.Ishaan takes 30 seconds and Aarav 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?
  18. 18.Find the HCF of 14 and 12.
  19. 19.What percent of 200 is 86?
  20. 20.Find the LCM of 3, 9 and 4.
  21. 21.Which is closest to 298 + 198 + 904? (a) 1600 (b) 1300 (c) 1400 (d) 1500
  22. 22.How many factors does 14 have?
  23. 23.Which is closest to 198 + 298 + 100? (a) 800 (b) 600 (c) 500 (d) 700
  24. 24.Which is closest to 701 + 303 + 805? (a) 1800 (b) 1700 (c) 1900 (d) 2000
  25. 25.12 painters can paint a school in 6 days. How many days would 9 painters take, working at the same speed?
  26. 26.A car goes 119 km on 7 litres of petrol. How far can it go on 39 litres (in km)?
  27. 27.8 × (17 − 13) + 21 ÷ 7 =
  28. 28.Find the LCM of 32 and 36.
  29. 29.85 − 72 ÷ 9 × 8 =
  30. 30.1/3 × 2/11 =
  31. 31.(14 + 2) × 3 − 3 =
  32. 32.What is 80% of 10?
  33. 33.32 + 12 × 2 − 7 =
  34. 34.72 ÷ 8 × 6 + 25 =
  35. 35.Find the third proportional to 3 and 9 (that is, 3 : 9 = 9 : ?).
  36. 36.Two tanks hold 240 litres and 200 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  37. 37.If 10 notebooks cost ₹310, how much do 13 notebooks cost (in ₹)?
  38. 38.What is the smallest number you must add to 530 so that it divides exactly by 11?
  39. 39.The HCF of two numbers is 5 and their LCM is 210. One of the numbers is 35. What is the other number?
  40. 40.12% of a number is 54. What is the number?

Answer key

  1. 62
  2. 4
  3. 180
  4. 105
  5. 68.8
  6. 2
  7. 35
  8. 32
  9. 1848
  10. 144
  11. 40
  12. 28/55
  13. 72
  14. 23.2
  15. 120
  16. 8000
  17. 270
  18. 2
  19. 43
  20. 36
  21. 1400
  22. 4
  23. 600
  24. 1800
  25. 8
  26. 663
  27. 35
  28. 288
  29. 21
  30. 2/33
  31. 45
  32. 8
  33. 49
  34. 79
  35. 27
  36. 40
  37. 403
  38. 9
  39. 30
  40. 450

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