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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 42 · 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 200 cm long and 75 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  2. 2.Find the third proportional to 8 and 16 (that is, 8 : 16 = 16 : ?).
  3. 3.Round 35305 to the nearest thousand.
  4. 4.What is 10% of 210?
  5. 5.5/6 of 30 + 9 × 8 =
  6. 6.Find the LCM of 7, 3 and 5.
  7. 7.A car goes 60 km on 5 litres of petrol. How far can it go on 8 litres (in km)?
  8. 8.Find the smallest number bigger than 8 that leaves a remainder of 2 when divided by 8, 4 or 3.
  9. 9.Arjun scored 68 marks out of 80 in a test. What percentage did Arjun score?
  10. 10.What percent of 20 is 18?
  11. 11.Three temple bells ring every 6, 4 and 10 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  12. 12.Round 19874 to the nearest hundred.
  13. 13.Round 79781 to the nearest hundred.
  14. 14.Round 5917 to the nearest thousand.
  15. 15.What is 7/8 of 72 litres?
  16. 16.If 6 kg of rice costs ₹450, how many kg can you buy for ₹900?
  17. 17.A hall floor is 120 cm long and 90 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  18. 18.A hostel has enough food for 4 students for 23 days. How many days will the same food last for 2 students?
  19. 19.Round 97259 to the nearest hundred.
  20. 20.What is the smallest number you must take away from 411 so that it divides exactly by 7?
  21. 21.Divide ₹141 between Tara and Isha in the ratio 1 : 2. How much does Tara get (in ₹)?
  22. 22.Which is closest to 700 × 19? (Round each number first.) (a) 1400 (b) 14000 (c) 28000 (d) 140000
  23. 23.8/10 × 8/12 =
  24. 24.Which is closest to 598 × 28? (Round each number first.) (a) 1800 (b) 180000 (c) 18000 (d) 36000
  25. 25.Find the HCF of 36 and 63.
  26. 26.Round 31.68 to one decimal place. =
  27. 27.If 7 mangoes cost ₹329, how much do 3 mangoes cost (in ₹)?
  28. 28.Find the third proportional to 7 and 14 (that is, 7 : 14 = 14 : ?).
  29. 29.Round 62.88 to one decimal place. =
  30. 30.Which is closest to 701 × 59? (Round each number first.) (a) 420000 (b) 42000 (c) 84000 (d) 4200
  31. 31.The HCF of two numbers is 3 and their LCM is 189. One of the numbers is 21. What is the other number?
  32. 32.88 ÷ 8 × 3 + 6 =
  33. 33.What is the smallest number you must take away from 151 so that it divides exactly by 3?
  34. 34.Find the HCF of 36 and 45.
  35. 35.7 : 11 = 56 : ?
  36. 36.Find the third proportional to 4 and 20 (that is, 4 : 20 = 20 : ?).
  37. 37.1.38 + 1.4 =
  38. 38.Divide ₹297 between Zoya and Meera in the ratio 2 : 9. How much does Zoya get (in ₹)?
  39. 39.How many factors does 90 have?
  40. 40.What is the smallest number you must take away from 329 so that it divides exactly by 8?

Answer key

  1. 24
  2. 32
  3. 35000
  4. 21
  5. 97
  6. 105
  7. 96
  8. 26
  9. 85
  10. 90
  11. 60
  12. 19900
  13. 79800
  14. 6000
  15. 63
  16. 12
  17. 12
  18. 46
  19. 97300
  20. 5
  21. 47
  22. 14000
  23. 8/15
  24. 18000
  25. 9
  26. 31.7
  27. 141
  28. 28
  29. 62.9
  30. 42000
  31. 27
  32. 39
  33. 1
  34. 9
  35. 88
  36. 100
  37. 2.78
  38. 54
  39. 12
  40. 1

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