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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 475 · 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 45 and 35.
  2. 2.If 11 notebooks cost ₹121, how much do 17 notebooks cost (in ₹)?
  3. 3.Find the LCM of 2, 6 and 14.
  4. 4.Zoya takes 45 seconds and Rohan takes 30 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?
  5. 5.7 × (30 − 12) + 70 ÷ 7 =
  6. 6.Isha takes 72 seconds and Rohan takes 54 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?
  7. 7.What is the smallest number you must add to 293 so that it divides exactly by 7?
  8. 8.10 painters can paint a school in 5 days. How many days would 5 painters take, working at the same speed?
  9. 9.How many factors does 61 have?
  10. 10.12 : 3 = 48 : ?
  11. 11.7 painters can paint a school in 10 days. How many days would 10 painters take, working at the same speed?
  12. 12.A car goes 40 km on 2 litres of petrol. How far can it go on 17 litres (in km)?
  13. 13.If 3 cricket balls cost ₹42, how much do 2 cricket balls cost (in ₹)?
  14. 14.Divide ₹405 between Sneha and Dev in the ratio 8 : 1. How much does Dev get (in ₹)?
  15. 15.Divide ₹400 between Manav and Diya in the ratio 5 : 3. How much does Manav get (in ₹)?
  16. 16.Write 4/5 as a percent.
  17. 17.Round 98555 to the nearest thousand.
  18. 18.3/4 − 1/9 =
  19. 19.79 − 63 ÷ 7 × 8 =
  20. 20.How many factors does 34 have?
  21. 21.41 − 21 ÷ 7 × 9 =
  22. 22.A car goes 30 km on 3 litres of petrol. How far can it go on 20 litres (in km)?
  23. 23.Find the third proportional to 3 and 15 (that is, 3 : 15 = 15 : ?).
  24. 24.Find the LCM of 30 and 12.
  25. 25.Find the HCF of 6 and 14.
  26. 26.Which of these numbers divides exactly by 8? (a) 8799 (b) 1681 (c) 1711 (d) 9976
  27. 27.Which is closest to 398 + 697 + 596? (a) 1900 (b) 1600 (c) 1700 (d) 1800
  28. 28.The HCF of two numbers is 4 and their LCM is 56. One of the numbers is 8. What is the other number?
  29. 29.Vivaan takes 36 seconds and Rohan takes 54 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?
  30. 30.A hall floor is 200 cm long and 120 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  31. 31.Aarav scored 3 marks out of 25 in a test. What percentage did Aarav score?
  32. 32.A hostel has enough food for 2 students for 7 days. How many days will the same food last for 7 students?
  33. 33.30% of a number is 72. What is the number?
  34. 34.Farhan takes 75 seconds and Priya 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?
  35. 35.Which is closest to 602 × 42? (Round each number first.) (a) 2400 (b) 240000 (c) 24000 (d) 48000
  36. 36.Find the LCM of 8, 9 and 4.
  37. 37.What is the smallest number you must take away from 120 so that it divides exactly by 11?
  38. 38.If 4 kg of rice costs ₹200, how many kg can you buy for ₹150?
  39. 39.8.55 + 1.9 =
  40. 40.33 − 35 ÷ 5 × 4 =

Answer key

  1. 315
  2. 187
  3. 42
  4. 90
  5. 136
  6. 216
  7. 1
  8. 10
  9. 2
  10. 12
  11. 7
  12. 340
  13. 28
  14. 45
  15. 250
  16. 80
  17. 99000
  18. 23/36
  19. 7
  20. 4
  21. 14
  22. 200
  23. 75
  24. 60
  25. 2
  26. 9976
  27. 1700
  28. 28
  29. 108
  30. 15
  31. 12
  32. 2
  33. 240
  34. 150
  35. 24000
  36. 72
  37. 10
  38. 3
  39. 10.45
  40. 5

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