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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 169 · 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.A hall floor is 280 cm long and 160 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  2. 2.30 + 9 × 9 − 20 =
  3. 3.The ratio of boys to girls in a class is 7 : 9. There are 70 boys. How many girls are there?
  4. 4.Farhan takes 45 seconds and Aarav 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?
  5. 5.9.82 + 9.3 =
  6. 6.Find the LCM of 10 and 14.
  7. 7.What is the smallest number you must add to 243 so that it divides exactly by 7?
  8. 8.The HCF of two numbers is 3 and their LCM is 18. One of the numbers is 9. What is the other number?
  9. 9.Which of these numbers divides exactly by 11? (a) 6369 (b) 7389 (c) 2789 (d) 2287
  10. 10.What is the smallest number you must take away from 235 so that it divides exactly by 3?
  11. 11.2.5 × 4 =
  12. 12.The HCF of two numbers is 5 and their LCM is 120. One of the numbers is 15. What is the other number?
  13. 13.Which is closest to 205 + 905 + 98? (a) 1400 (b) 1300 (c) 1100 (d) 1200
  14. 14.Round 18.21 to one decimal place. =
  15. 15.Divide ₹192 between Karan and Nisha in the ratio 7 : 9. How much does Nisha get (in ₹)?
  16. 16.What is the smallest number you must add to 419 so that it divides exactly by 8?
  17. 17.32 + 5 × 6 − 23 =
  18. 18.Farhan scored 6 marks out of 20 in a test. What percentage did Farhan score?
  19. 19.How many factors does 53 have?
  20. 20.What is 4/7 of 98 km?
  21. 21.If 2 kg of rice costs ₹92, how many kg can you buy for ₹322?
  22. 22.What is the smallest number you must take away from 685 so that it divides exactly by 12?
  23. 23.Find the smallest number bigger than 10 that leaves a remainder of 1 when divided by 3, 6 or 10.
  24. 24.What is the smallest number you must add to 779 so that it divides exactly by 9?
  25. 25.30 + 12 × 12 − 5 =
  26. 26.What is the smallest number you must take away from 610 so that it divides exactly by 6?
  27. 27.If 7 notebooks cost ₹308, how much do 10 notebooks cost (in ₹)?
  28. 28.What is the smallest number you must add to 475 so that it divides exactly by 13?
  29. 29.A car goes 34 km on 2 litres of petrol. How far can it go on 30 litres (in km)?
  30. 30.Which is closest to 3492 ÷ 49? (a) 700 (b) 140 (c) 70 (d) 35
  31. 31.7 × (10 − 2) + 16 ÷ 2 =
  32. 32.Rahul scored 28 marks out of 40 in a test. What percentage did Rahul score?
  33. 33.Find the HCF of 70 and 112.
  34. 34.12 painters can paint a school in 15 days. How many days would 18 painters take, working at the same speed?
  35. 35.Find the smallest number bigger than 10 that leaves a remainder of 1 when divided by 10, 4 or 6.
  36. 36.What is the smallest number you must add to 442 so that it divides exactly by 11?
  37. 37.A hall floor is 210 cm long and 60 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  38. 38.5.79 + 6.4 =
  39. 39.Round 42.86 to one decimal place. =
  40. 40.Which of these numbers divides exactly by 4? (a) 7604 (b) 7395 (c) 9755 (d) 8957

Answer key

  1. 28
  2. 91
  3. 90
  4. 360
  5. 19.12
  6. 70
  7. 2
  8. 6
  9. 6369
  10. 1
  11. 10
  12. 40
  13. 1200
  14. 18.2
  15. 108
  16. 5
  17. 39
  18. 30
  19. 2
  20. 56
  21. 7
  22. 1
  23. 31
  24. 4
  25. 169
  26. 4
  27. 440
  28. 6
  29. 510
  30. 70
  31. 64
  32. 70
  33. 14
  34. 10
  35. 61
  36. 9
  37. 14
  38. 12.19
  39. 42.9
  40. 7604

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