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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 435 · 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 the smallest number you must take away from 491 so that it divides exactly by 8?
  2. 2.Which of these numbers divides exactly by 3? (a) 3472 (b) 6726 (c) 4658 (d) 1033
  3. 3.7.33 + 1.9 =
  4. 4.Three temple bells ring every 24, 9 and 18 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  5. 5.21 − 8 ÷ 4 × 6 =
  6. 6.2 × (20 − 11) + 8 ÷ 4 =
  7. 7.Three temple bells ring every 12, 10 and 15 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  8. 8.A hostel has enough food for 5 students for 20 days. How many days will the same food last for 2 students?
  9. 9.What is the smallest number you must take away from 842 so that it divides exactly by 8?
  10. 10.Divide ₹119 between Tara and Rahul in the ratio 6 : 1. How much does Tara get (in ₹)?
  11. 11.3 × (29 − 2) + 18 ÷ 9 =
  12. 12.Three temple bells ring every 4, 8 and 18 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  13. 13.Three temple bells ring every 20, 6 and 10 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  14. 14.A hall floor is 360 cm long and 135 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  15. 15.What is the smallest number you must add to 389 so that it divides exactly by 9?
  16. 16.Find the LCM of 4, 5 and 3.
  17. 17.The HCF of two numbers is 8 and their LCM is 112. One of the numbers is 16. What is the other number?
  18. 18.Find the LCM of 3 and 5.
  19. 19.If 8 notebooks cost ₹400, how much do 14 notebooks cost (in ₹)?
  20. 20.Find the third proportional to 3 and 15 (that is, 3 : 15 = 15 : ?).
  21. 21.Two tanks hold 140 litres and 180 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  22. 22.9 × (20 − 16) + 9 ÷ 3 =
  23. 23.The HCF of two numbers is 3 and their LCM is 63. One of the numbers is 21. What is the other number?
  24. 24.Round 25.54 to one decimal place. =
  25. 25.The ratio of boys to girls in a class is 5 : 8. There are 20 boys. How many girls are there?
  26. 26.Round 71237 to the nearest ten.
  27. 27.Which is closest to 1391 ÷ 21? (a) 35 (b) 140 (c) 70 (d) 700
  28. 28.Ananya takes 80 seconds and Isha takes 48 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?
  29. 29.Round 31881 to the nearest hundred.
  30. 30.75.6 ÷ 9 =
  31. 31.9 × (20 − 3) + 16 ÷ 4 =
  32. 32.What is 80% of 265?
  33. 33.Which is closest to 198 × 82? (Round each number first.) (a) 160000 (b) 16000 (c) 1600 (d) 32000
  34. 34.How many factors does 95 have?
  35. 35.What percent of 25 is 7?
  36. 36.Find the smallest number bigger than 12 that leaves a remainder of 2 when divided by 4, 10 or 12.
  37. 37.5.03 + 2.3 =
  38. 38.Three temple bells ring every 18, 9 and 15 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  39. 39.What is 2/5 of ₹90?
  40. 40.10% of a number is 2. What is the number?

Answer key

  1. 3
  2. 6726
  3. 9.23
  4. 72
  5. 9
  6. 20
  7. 60
  8. 50
  9. 2
  10. 102
  11. 83
  12. 72
  13. 60
  14. 24
  15. 7
  16. 60
  17. 56
  18. 15
  19. 700
  20. 75
  21. 20
  22. 39
  23. 9
  24. 25.5
  25. 32
  26. 71240
  27. 70
  28. 240
  29. 31900
  30. 8.4
  31. 157
  32. 212
  33. 16000
  34. 4
  35. 28
  36. 62
  37. 7.33
  38. 90
  39. 36
  40. 20

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