← Practice: number skills lesson New set →

Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 688 · 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.How many factors does 37 have?
  2. 2.Find the HCF of 24 and 27.
  3. 3.The ratio of boys to girls in a class is 7 : 8. There are 70 boys. How many girls are there?
  4. 4.What is the smallest number you must add to 991 so that it divides exactly by 6?
  5. 5.If 3 notebooks cost ₹135, how much do 20 notebooks cost (in ₹)?
  6. 6.What is the smallest number you must take away from 979 so that it divides exactly by 12?
  7. 7.The HCF of two numbers is 8 and their LCM is 280. One of the numbers is 40. What is the other number?
  8. 8.A car goes 128 km on 8 litres of petrol. How far can it go on 22 litres (in km)?
  9. 9.4/7 of 63 + 8 × 4 =
  10. 10.Divide ₹36 between Aditya and Dev in the ratio 1 : 2. How much does Dev get (in ₹)?
  11. 11.5 : 4 = 25 : ?
  12. 12.Which is closest to 603 + 101 + 801? (a) 1400 (b) 1600 (c) 1700 (d) 1500
  13. 13.Divide ₹564 between Kavya and Aditya in the ratio 5 : 7. How much does Kavya get (in ₹)?
  14. 14.If 5 erasers cost ₹230, how much do 14 erasers cost (in ₹)?
  15. 15.What is 40% of 40?
  16. 16.How many factors does 30 have?
  17. 17.What is the smallest number you must take away from 283 so that it divides exactly by 6?
  18. 18.The HCF of two numbers is 3 and their LCM is 63. One of the numbers is 21. What is the other number?
  19. 19.What is the smallest number you must add to 503 so that it divides exactly by 8?
  20. 20.If 5 kg of rice costs ₹315, how many kg can you buy for ₹378?
  21. 21.Which of these numbers divides exactly by 3? (a) 5424 (b) 9562 (c) 5296 (d) 3124
  22. 22.Which of these numbers divides exactly by 4? (a) 6594 (b) 6124 (c) 1743 (d) 9601
  23. 23.Find the LCM of 42 and 12.
  24. 24.If 3 kg of rice costs ₹75, how many kg can you buy for ₹50?
  25. 25.3 : 15 = 21 : ?
  26. 26.Find the third proportional to 3 and 6 (that is, 3 : 6 = 6 : ?).
  27. 27.Rahul takes 30 seconds and Priya 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?
  28. 28.Saanvi scored 17 marks out of 20 in a test. What percentage did Saanvi score?
  29. 29.Which is closest to 103 + 899 + 97? (a) 1300 (b) 1200 (c) 1000 (d) 1100
  30. 30.Round 27471 to the nearest thousand.
  31. 31.Find the LCM of 6 and 10.
  32. 32.Ishaan takes 90 seconds and Priya 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?
  33. 33.Find the LCM of 2, 12 and 13.
  34. 34.3 × (18 − 6) + 6 ÷ 3 =
  35. 35.15% of a number is 78. What is the number?
  36. 36.Pooja takes 90 seconds and Meera takes 36 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?
  37. 37.What is the smallest number you must take away from 605 so that it divides exactly by 13?
  38. 38.Two tanks hold 40 litres and 60 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  39. 39.Find the third proportional to 9 and 36 (that is, 9 : 36 = 36 : ?).
  40. 40.Find the HCF of 36 and 16.

Answer key

  1. 2
  2. 3
  3. 80
  4. 5
  5. 900
  6. 7
  7. 56
  8. 352
  9. 68
  10. 24
  11. 20
  12. 1500
  13. 235
  14. 644
  15. 16
  16. 8
  17. 1
  18. 9
  19. 1
  20. 6
  21. 5424
  22. 6124
  23. 84
  24. 2
  25. 105
  26. 12
  27. 240
  28. 85
  29. 1100
  30. 27000
  31. 30
  32. 450
  33. 156
  34. 38
  35. 520
  36. 180
  37. 7
  38. 20
  39. 144
  40. 4

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude