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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 278 · 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. 1.109 − 56 ÷ 7 × 9 =
  2. 2.Find the HCF of 36 and 60.
  3. 3.How many factors does 17 have?
  4. 4.6 painters can paint a school in 18 days. How many days would 4 painters take, working at the same speed?
  5. 5.What is the smallest number you must take away from 255 so that it divides exactly by 9?
  6. 6.The HCF of two numbers is 3 and their LCM is 84. One of the numbers is 12. What is the other number?
  7. 7.1/3 − 1/7 =
  8. 8.Arjun scored 5 marks out of 25 in a test. What percentage did Arjun score?
  9. 9.Find the LCM of 9, 3 and 4.
  10. 10.Find the LCM of 9, 6 and 14.
  11. 11.Kabir takes 30 seconds and Kavya takes 45 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?
  12. 12.50% of a number is 171. What is the number?
  13. 13.A car goes 147 km on 7 litres of petrol. How far can it go on 24 litres (in km)?
  14. 14.Two tanks hold 180 litres and 100 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  15. 15.Find the smallest number bigger than 8 that leaves a remainder of 2 when divided by 8, 6 or 4.
  16. 16.Find the LCM of 15 and 12.
  17. 17.Ishaan scored 6 marks out of 40 in a test. What percentage did Ishaan score?
  18. 18.How many factors does 19 have?
  19. 19.What is the smallest number you must take away from 248 so that it divides exactly by 7?
  20. 20.Find the HCF of 9 and 21.
  21. 21.A hostel has enough food for 11 students for 28 days. How many days will the same food last for 7 students?
  22. 22.Three temple bells ring every 24, 12 and 5 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  23. 23.Which is closest to 403 ÷ 21? (a) 200 (b) 40 (c) 20 (d) 10
  24. 24.How many factors does 85 have?
  25. 25.(20 + 10) × 9 − 28 =
  26. 26.A hall floor is 315 cm long and 225 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  27. 27.Find the third proportional to 8 and 24 (that is, 8 : 24 = 24 : ?).
  28. 28.What is the smallest number you must add to 197 so that it divides exactly by 9?
  29. 29.(5 + 11) × 3 − 27 =
  30. 30.3/8 + 8/12 =
  31. 31.What is 75% of 180?
  32. 32.Find the LCM of 6, 9 and 14.
  33. 33.Find the LCM of 24 and 42.
  34. 34.If 3 notebooks cost ₹81, how much do 4 notebooks cost (in ₹)?
  35. 35.The ratio of boys to girls in a class is 9 : 4. There are 36 boys. How many girls are there?
  36. 36.Find the LCM of 15, 2 and 7.
  37. 37.What is 150% of 194?
  38. 38.A hostel has enough food for 5 students for 7 days. How many days will the same food last for 7 students?
  39. 39.9 painters can paint a school in 6 days. How many days would 3 painters take, working at the same speed?
  40. 40.What is the smallest number you must add to 850 so that it divides exactly by 13?

Answer key

  1. 37
  2. 12
  3. 2
  4. 27
  5. 3
  6. 21
  7. 4/21
  8. 20
  9. 36
  10. 126
  11. 90
  12. 342
  13. 504
  14. 20
  15. 26
  16. 60
  17. 15
  18. 2
  19. 3
  20. 3
  21. 44
  22. 120
  23. 20
  24. 4
  25. 242
  26. 35
  27. 72
  28. 1
  29. 21
  30. 25/24
  31. 135
  32. 126
  33. 168
  34. 108
  35. 16
  36. 210
  37. 291
  38. 5
  39. 18
  40. 8

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