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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 672 · 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.Three temple bells ring every 6, 12 and 30 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  2. 2.How many factors does 97 have?
  3. 3.Round 8503 to the nearest thousand.
  4. 4.3 : 15 = 21 : ?
  5. 5.If 2 pens cost ₹86, how much do 5 pens cost (in ₹)?
  6. 6.4 painters can paint a school in 10 days. How many days would 5 painters take, working at the same speed?
  7. 7.8 : 10 = 64 : ?
  8. 8.Divide ₹231 between Ananya and Kavya in the ratio 7 : 4. How much does Ananya get (in ₹)?
  9. 9.3.3 × 4 =
  10. 10.The HCF of two numbers is 2 and their LCM is 112. One of the numbers is 16. What is the other number?
  11. 11.Ananya takes 60 seconds and Karan takes 50 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.A car goes 39 km on 3 litres of petrol. How far can it go on 32 litres (in km)?
  13. 13.Which is closest to 795 + 300 + 704? (a) 1800 (b) 2000 (c) 1700 (d) 1900
  14. 14.Dev takes 72 seconds and Ananya takes 60 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. 15.5 : 9 = 15 : ?
  16. 16.Find the third proportional to 2 and 4 (that is, 2 : 4 = 4 : ?).
  17. 17.The ratio of boys to girls in a class is 1 : 7. There are 9 boys. How many girls are there?
  18. 18.7.1 × 9 =
  19. 19.Find the LCM of 3, 13 and 9.
  20. 20.Round 13331 to the nearest ten.
  21. 21.How many factors does 24 have?
  22. 22.11 : 9 = 33 : ?
  23. 23.4/5 − 5/8 =
  24. 24.Round 11883 to the nearest ten.
  25. 25.Find the HCF of 70 and 90.
  26. 26.2 painters can paint a school in 24 days. How many days would 4 painters take, working at the same speed?
  27. 27.8.73 + 6.2 =
  28. 28.8 × (25 − 23) + 36 ÷ 4 =
  29. 29.75% of a number is 66. What is the number?
  30. 30.What is the smallest number you must take away from 341 so that it divides exactly by 8?
  31. 31.If 5 kg of rice costs ₹105, how many kg can you buy for ₹42?
  32. 32.7.1 × 5 =
  33. 33.2 : 5 = 10 : ?
  34. 34.Which is closest to 97 + 700 + 298? (a) 1300 (b) 1100 (c) 1000 (d) 1200
  35. 35.The ratio of boys to girls in a class is 4 : 1. There are 12 boys. How many girls are there?
  36. 36.Find the third proportional to 2 and 6 (that is, 2 : 6 = 6 : ?).
  37. 37.What is the smallest number you must take away from 999 so that it divides exactly by 4?
  38. 38.Aditya scored 16 marks out of 20 in a test. What percentage did Aditya score?
  39. 39.The HCF of two numbers is 7 and their LCM is 315. One of the numbers is 63. What is the other number?
  40. 40.What is 15% of 300?

Answer key

  1. 60
  2. 2
  3. 9000
  4. 105
  5. 215
  6. 8
  7. 80
  8. 147
  9. 13.2
  10. 14
  11. 300
  12. 416
  13. 1800
  14. 360
  15. 27
  16. 8
  17. 63
  18. 63.9
  19. 117
  20. 13330
  21. 8
  22. 27
  23. 7/40
  24. 11880
  25. 10
  26. 12
  27. 14.93
  28. 25
  29. 88
  30. 5
  31. 2
  32. 35.5
  33. 25
  34. 1100
  35. 3
  36. 18
  37. 3
  38. 80
  39. 35
  40. 45

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