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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 341 · 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.The HCF of two numbers is 9 and their LCM is 162. One of the numbers is 81. What is the other number?
  2. 2.4.87 + 3.8 =
  3. 3.33 + 11 × 5 − 3 =
  4. 4.Find the HCF of 30 and 70.
  5. 5.1/3 of 24 + 9 × 3 =
  6. 6.Two tanks hold 40 litres and 140 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  7. 7.4/7 + 1/8 =
  8. 8.A hall floor is 200 cm long and 80 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  9. 9.7/8 − 1/5 =
  10. 10.5/6 + 3/4 =
  11. 11.Three temple bells ring every 10, 15 and 5 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  12. 12.The ratio of boys to girls in a class is 7 : 2. There are 21 boys. How many girls are there?
  13. 13.Which of these numbers divides exactly by 11? (a) 6817 (b) 2596 (c) 2754 (d) 3951
  14. 14.Which is closest to 103 + 705 + 201? (a) 1200 (b) 1000 (c) 900 (d) 1100
  15. 15.Round 11.28 to one decimal place. =
  16. 16.Two tanks hold 200 litres and 240 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
  17. 17.If 7 kg of rice costs ₹623, how many kg can you buy for ₹356?
  18. 18.Which is closest to 999 ÷ 19? (a) 100 (b) 25 (c) 500 (d) 50
  19. 19.40% of a number is 94. What is the number?
  20. 20.Which of these numbers divides exactly by 11? (a) 7179 (b) 5038 (c) 8513 (d) 2610
  21. 21.Find the HCF of 40 and 35.
  22. 22.Find the LCM of 36 and 16.
  23. 23.7.3 × 7 =
  24. 24.Kavya scored 3 marks out of 20 in a test. What percentage did Kavya score?
  25. 25.Find the third proportional to 3 and 12 (that is, 3 : 12 = 12 : ?).
  26. 26.Round 97747 to the nearest thousand.
  27. 27.7 × (11 − 8) + 32 ÷ 8 =
  28. 28.Sneha scored 12 marks out of 20 in a test. What percentage did Sneha score?
  29. 29.Three temple bells ring every 5, 24 and 10 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  30. 30.If 6 kg of rice costs ₹438, how many kg can you buy for ₹146?
  31. 31.If 4 kg of rice costs ₹88, how many kg can you buy for ₹66?
  32. 32.How many factors does 28 have?
  33. 33.(13 + 17) × 4 − 11 =
  34. 34.Write 1/5 as a percent.
  35. 35.Kabir takes 90 seconds and Aditya 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?
  36. 36.7.24 + 9.6 =
  37. 37.The ratio of boys to girls in a class is 1 : 9. There are 4 boys. How many girls are there?
  38. 38.What is 1/3 of 36 students?
  39. 39.A car goes 60 km on 4 litres of petrol. How far can it go on 22 litres (in km)?
  40. 40.The HCF of two numbers is 3 and their LCM is 72. One of the numbers is 9. What is the other number?

Answer key

  1. 18
  2. 8.67
  3. 85
  4. 10
  5. 35
  6. 20
  7. 39/56
  8. 10
  9. 27/40
  10. 19/12
  11. 30
  12. 6
  13. 2596
  14. 1000
  15. 11.3
  16. 40
  17. 4
  18. 50
  19. 235
  20. 5038
  21. 5
  22. 144
  23. 51.1
  24. 15
  25. 48
  26. 98000
  27. 25
  28. 60
  29. 120
  30. 2
  31. 3
  32. 6
  33. 109
  34. 20
  35. 720
  36. 16.84
  37. 36
  38. 12
  39. 330
  40. 24

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