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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 839 · 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 smallest number bigger than 15 that leaves a remainder of 1 when divided by 15, 3 or 10.
  2. 2.How many factors does 47 have?
  3. 3.The HCF of two numbers is 3 and their LCM is 72. One of the numbers is 24. What is the other number?
  4. 4.Aarav takes 36 seconds and Sneha 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.Karan takes 80 seconds and Priya 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?
  6. 6.79 − 25 ÷ 5 × 8 =
  7. 7.57 − 35 ÷ 7 × 5 =
  8. 8.The HCF of two numbers is 6 and their LCM is 72. One of the numbers is 18. What is the other number?
  9. 9.Find the third proportional to 5 and 20 (that is, 5 : 20 = 20 : ?).
  10. 10.Find the smallest number bigger than 10 that leaves a remainder of 3 when divided by 5, 4 or 10.
  11. 11.39 − 6 ÷ 2 × 8 =
  12. 12.Find the HCF of 105 and 135.
  13. 13.What percent of 40 is 4?
  14. 14.A car goes 120 km on 5 litres of petrol. How far can it go on 3 litres (in km)?
  15. 15.Which of these numbers divides exactly by 4? (a) 9926 (b) 2257 (c) 2276 (d) 5750
  16. 16.Which of these numbers divides exactly by 11? (a) 2467 (b) 2258 (c) 9482 (d) 1813
  17. 17.Which is closest to 702 × 48? (Round each number first.) (a) 70000 (b) 350000 (c) 35000 (d) 3500
  18. 18.Find the HCF of 20 and 45.
  19. 19.47.7 ÷ 9 =
  20. 20.1/2 − 1/7 =
  21. 21.2/5 + 1/2 =
  22. 22.6 ÷ 3 × 3 + 8 =
  23. 23.3/7 − 1/4 =
  24. 24.What is 1/5 of 45 kg?
  25. 25.Which of these numbers divides exactly by 9? (a) 6646 (b) 3053 (c) 8515 (d) 5841
  26. 26.75% of a number is 450. What is the number?
  27. 27.Find the smallest number bigger than 8 that leaves a remainder of 2 when divided by 8, 3 or 5.
  28. 28.Isha takes 45 seconds and Kavya takes 36 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?
  29. 29.Three temple bells ring every 30, 20 and 15 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  30. 30.If 9 kites cost ₹198, how much do 2 kites cost (in ₹)?
  31. 31.6 painters can paint a school in 10 days. How many days would 15 painters take, working at the same speed?
  32. 32.Find the LCM of 3, 9 and 2.
  33. 33.Find the LCM of 11, 4 and 10.
  34. 34.Which is closest to 799 × 21? (Round each number first.) (a) 16000 (b) 160000 (c) 1600 (d) 32000
  35. 35.Find the LCM of 7, 9 and 3.
  36. 36.Which is closest to 701 + 305 + 96? (a) 1100 (b) 1000 (c) 1300 (d) 1200
  37. 37.Round 93.13 to one decimal place. =
  38. 38.Which is closest to 603 × 49? (Round each number first.) (a) 3000 (b) 30000 (c) 300000 (d) 60000
  39. 39.Three temple bells ring every 8, 15 and 6 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  40. 40.If 4 kg of rice costs ₹168, how many kg can you buy for ₹336?

Answer key

  1. 31
  2. 2
  3. 9
  4. 360
  5. 240
  6. 39
  7. 32
  8. 24
  9. 80
  10. 23
  11. 15
  12. 15
  13. 10
  14. 72
  15. 2276
  16. 9482
  17. 35000
  18. 5
  19. 5.3
  20. 5/14
  21. 9/10
  22. 14
  23. 5/28
  24. 9
  25. 5841
  26. 600
  27. 122
  28. 180
  29. 60
  30. 44
  31. 4
  32. 18
  33. 220
  34. 16000
  35. 63
  36. 1100
  37. 93.1
  38. 30000
  39. 120
  40. 8

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