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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 340 · 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 LCM of 15, 10 and 5.
  2. 2.Find the HCF of 77 and 66.
  3. 3.If 4 notebooks cost ₹144, how much do 15 notebooks cost (in ₹)?
  4. 4.Which is closest to 496 × 70? (Round each number first.) (a) 70000 (b) 350000 (c) 3500 (d) 35000
  5. 5.The ratio of boys to girls in a class is 3 : 2. There are 9 boys. How many girls are there?
  6. 6.Divide ₹77 between Rahul and Vivaan in the ratio 8 : 3. How much does Vivaan get (in ₹)?
  7. 7.If 12 pens cost ₹48, how much do 11 pens cost (in ₹)?
  8. 8.Which is closest to 804 × 60? (Round each number first.) (a) 4800 (b) 480000 (c) 96000 (d) 48000
  9. 9.Which is closest to 1591 ÷ 21? (a) 40 (b) 800 (c) 160 (d) 80
  10. 10.A hostel has enough food for 7 students for 28 days. How many days will the same food last for 4 students?
  11. 11.What is the smallest number you must add to 990 so that it divides exactly by 7?
  12. 12.Find the LCM of 6, 4 and 12.
  13. 13.Aarav takes 45 seconds and Sneha takes 40 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?
  14. 14.A car goes 264 km on 12 litres of petrol. How far can it go on 13 litres (in km)?
  15. 15.3/4 × 10/11 =
  16. 16.How many factors does 32 have?
  17. 17.Find the HCF of 20 and 30.
  18. 18.A hall floor is 270 cm long and 225 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  19. 19.7 painters can paint a school in 27 days. How many days would 21 painters take, working at the same speed?
  20. 20.Which is closest to 797 × 79? (Round each number first.) (a) 64000 (b) 6400 (c) 128000 (d) 640000
  21. 21.A car goes 126 km on 9 litres of petrol. How far can it go on 5 litres (in km)?
  22. 22.Find the LCM of 24 and 18.
  23. 23.What is 60% of 500?
  24. 24.1/3 × 6/9 =
  25. 25.Which is closest to 203 × 69? (Round each number first.) (a) 140000 (b) 1400 (c) 28000 (d) 14000
  26. 26.Find the HCF of 63 and 72.
  27. 27.Divide ₹235 between Rahul and Kavya in the ratio 1 : 4. How much does Rahul get (in ₹)?
  28. 28.8 ÷ 2 × 3 + 2 =
  29. 29.The HCF of two numbers is 5 and their LCM is 90. One of the numbers is 45. What is the other number?
  30. 30.Round 14.38 to one decimal place. =
  31. 31.What is 80% of 500?
  32. 32.(13 + 13) × 4 − 8 =
  33. 33.A car goes 115 km on 5 litres of petrol. How far can it go on 7 litres (in km)?
  34. 34.A car goes 48 km on 2 litres of petrol. How far can it go on 8 litres (in km)?
  35. 35.What percent of 200 is 16?
  36. 36.1.9 × 7 =
  37. 37.Round 33.68 to one decimal place. =
  38. 38.Dev scored 3 marks out of 20 in a test. What percentage did Dev score?
  39. 39.Which is closest to 797 × 29? (Round each number first.) (a) 48000 (b) 24000 (c) 2400 (d) 240000
  40. 40.Find the LCM of 3, 9 and 2.

Answer key

  1. 30
  2. 11
  3. 540
  4. 35000
  5. 6
  6. 21
  7. 44
  8. 48000
  9. 80
  10. 49
  11. 4
  12. 12
  13. 360
  14. 286
  15. 15/22
  16. 6
  17. 10
  18. 30
  19. 9
  20. 64000
  21. 70
  22. 72
  23. 300
  24. 2/9
  25. 14000
  26. 9
  27. 47
  28. 14
  29. 10
  30. 14.4
  31. 400
  32. 96
  33. 161
  34. 192
  35. 8
  36. 13.3
  37. 33.7
  38. 15
  39. 24000
  40. 18

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