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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 725 · 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. 1.9 ÷ 3 × 9 + 4 =
  2. 2.10 + 8 × 8 − 5 =
  3. 3.7/10 × 1/2 =
  4. 4.Find the LCM of 21 and 9.
  5. 5.How many factors does 74 have?
  6. 6.Write 1/2 as a percent.
  7. 7.(7 + 9) × 3 − 2 =
  8. 8.What is 25% of 152?
  9. 9.1/11 + 4/5 =
  10. 10.77 ÷ 7 × 6 + 23 =
  11. 11.3 painters can paint a school in 12 days. How many days would 4 painters take, working at the same speed?
  12. 12.What is the smallest number you must add to 904 so that it divides exactly by 11?
  13. 13.How many factors does 21 have?
  14. 14.Find the HCF of 65 and 91.
  15. 15.Two tanks hold 20 litres and 15 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  16. 16.Three temple bells ring every 15, 5 and 6 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  17. 17.1/2 + 2/4 =
  18. 18.Find the LCM of 3, 9 and 14.
  19. 19.21 + 12 × 2 − 17 =
  20. 20.Ananya takes 36 seconds and Priya 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?
  21. 21.Rahul takes 72 seconds and Aditya 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?
  22. 22.The ratio of boys to girls in a class is 5 : 6. There are 10 boys. How many girls are there?
  23. 23.Which is closest to 699 × 62? (Round each number first.) (a) 420000 (b) 84000 (c) 42000 (d) 4200
  24. 24.9 : 10 = 27 : ?
  25. 25.If 7 mangoes cost ₹77, how much do 3 mangoes cost (in ₹)?
  26. 26.Arjun takes 60 seconds and Rahul 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?
  27. 27.If 4 kg of rice costs ₹152, how many kg can you buy for ₹114?
  28. 28.If 8 kg of rice costs ₹256, how many kg can you buy for ₹320?
  29. 29.Divide ₹171 between Kabir and Manav in the ratio 1 : 8. How much does Kabir get (in ₹)?
  30. 30.Find the third proportional to 9 and 18 (that is, 9 : 18 = 18 : ?).
  31. 31.Find the third proportional to 8 and 40 (that is, 8 : 40 = 40 : ?).
  32. 32.Which is closest to 1602 ÷ 21? (a) 80 (b) 40 (c) 160 (d) 800
  33. 33.What percent of 400 is 352?
  34. 34.Which of these numbers divides exactly by 4? (a) 2325 (b) 4461 (c) 1040 (d) 7054
  35. 35.Find the LCM of 8, 6 and 14.
  36. 36.Two tanks hold 60 litres and 45 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  37. 37.Which is closest to 504 × 41? (Round each number first.) (a) 200000 (b) 40000 (c) 2000 (d) 20000
  38. 38.The HCF of two numbers is 8 and their LCM is 48. One of the numbers is 24. What is the other number?
  39. 39.What is 50% of 8?
  40. 40.A car goes 18 km on 2 litres of petrol. How far can it go on 11 litres (in km)?

Answer key

  1. 31
  2. 69
  3. 7/20
  4. 63
  5. 4
  6. 50
  7. 46
  8. 38
  9. 49/55
  10. 89
  11. 9
  12. 9
  13. 4
  14. 13
  15. 5
  16. 30
  17. 1
  18. 126
  19. 28
  20. 180
  21. 360
  22. 12
  23. 42000
  24. 30
  25. 33
  26. 240
  27. 3
  28. 10
  29. 19
  30. 36
  31. 200
  32. 80
  33. 88
  34. 1040
  35. 168
  36. 15
  37. 20000
  38. 16
  39. 4
  40. 99

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