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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 372 · 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. 1.3/11 + 4/10 =
  2. 2.What is the smallest number you must add to 123 so that it divides exactly by 13?
  3. 3.Find the smallest number bigger than 15 that leaves a remainder of 2 when divided by 12, 15 or 3.
  4. 4.If 4 pencil boxes cost ₹40, how much do 20 pencil boxes cost (in ₹)?
  5. 5.A hall floor is 480 cm long and 180 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  6. 6.Find the HCF of 15 and 24.
  7. 7.(19 + 5) × 2 − 23 =
  8. 8.How many factors does 38 have?
  9. 9.7.1 × 4 =
  10. 10.How many factors does 18 have?
  11. 11.Dev takes 48 seconds and Nisha takes 80 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. 12.1.8 × 4 =
  13. 13.What is the smallest number you must add to 259 so that it divides exactly by 3?
  14. 14.Pooja takes 40 seconds and Kabir takes 75 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?
  15. 15.What is the smallest number you must take away from 445 so that it divides exactly by 6?
  16. 16.A car goes 60 km on 4 litres of petrol. How far can it go on 23 litres (in km)?
  17. 17.Which is closest to 499 × 18? (Round each number first.) (a) 10000 (b) 100000 (c) 1000 (d) 20000
  18. 18.Find the HCF of 24 and 40.
  19. 19.60% of a number is 183. What is the number?
  20. 20.If 9 kg of rice costs ₹711, how many kg can you buy for ₹1027?
  21. 21.The HCF of two numbers is 5 and their LCM is 120. One of the numbers is 40. What is the other number?
  22. 22.Find the HCF of 42 and 70.
  23. 23.If 6 mangoes cost ₹180, how much do 12 mangoes cost (in ₹)?
  24. 24.How many factors does 85 have?
  25. 25.What is the smallest number you must take away from 408 so that it divides exactly by 9?
  26. 26.Which is closest to 901 × 38? (Round each number first.) (a) 360000 (b) 3600 (c) 72000 (d) 36000
  27. 27.2/3 × 3/4 =
  28. 28.Round 97.89 to one decimal place. =
  29. 29.The ratio of boys to girls in a class is 1 : 2. There are 6 boys. How many girls are there?
  30. 30.Find the LCM of 42 and 48.
  31. 31.Round 4994 to the nearest thousand.
  32. 32.Divide ₹385 between Pooja and Meera in the ratio 1 : 6. How much does Meera get (in ₹)?
  33. 33.Round 75.46 to one decimal place. =
  34. 34.What percent of 400 is 232?
  35. 35.Karan takes 72 seconds and Ananya 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?
  36. 36.Which is closest to 798 × 79? (Round each number first.) (a) 64000 (b) 6400 (c) 640000 (d) 128000
  37. 37.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?
  38. 38.Find the LCM of 24 and 21.
  39. 39.Divide ₹156 between Vivaan and Karan in the ratio 1 : 2. How much does Karan get (in ₹)?
  40. 40.Which is closest to 3506 ÷ 51? (a) 70 (b) 700 (c) 35 (d) 140

Answer key

  1. 37/55
  2. 7
  3. 62
  4. 200
  5. 24
  6. 3
  7. 25
  8. 4
  9. 28.4
  10. 6
  11. 240
  12. 7.2
  13. 2
  14. 600
  15. 1
  16. 345
  17. 10000
  18. 8
  19. 305
  20. 13
  21. 15
  22. 14
  23. 360
  24. 4
  25. 3
  26. 36000
  27. 1/2
  28. 97.9
  29. 12
  30. 336
  31. 5000
  32. 330
  33. 75.5
  34. 58
  35. 360
  36. 64000
  37. 24
  38. 168
  39. 104
  40. 70

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