Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 138 · 40 questions

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?

1. 1.How many factors does 70 have?
2. 2.Find the LCM of 3, 6 and 9.
3. 3.7 painters can paint a school in 5 days. How many days would 5 painters take, working at the same speed?
4. 4.Round 94464 to the nearest hundred.
5. 5.Which is closest to 1796 ÷ 21? (a) 180 (b) 900 (c) 45 (d) 90
6. 6.A hostel has enough food for 10 students for 5 days. How many days will the same food last for 2 students?
7. 7.The HCF of two numbers is 7 and their LCM is 168. One of the numbers is 56. What is the other number?
8. 8.(4 + 11) × 8 − 4 =
9. 9.What is 60% of 175?
10. 10.Which of these numbers divides exactly by 4? (a) 5704 (b) 8773 (c) 3210 (d) 1207
11. 11.Which of these numbers divides exactly by 8? (a) 6778 (b) 6324 (c) 5471 (d) 3600
12. 12.Two tanks hold 120 litres and 135 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
13. 13.What is the smallest number you must add to 488 so that it divides exactly by 9?
14. 14.The ratio of boys to girls in a class is 1 : 9. There are 8 boys. How many girls are there?
15. 15.Find the third proportional to 3 and 12 (that is, 3 : 12 = 12 : ?).
16. 16.What is the smallest number you must add to 535 so that it divides exactly by 12?
17. 17.A car goes 200 km on 8 litres of petrol. How far can it go on 34 litres (in km)?
18. 18.Which is closest to 98 + 99 + 501? (a) 700 (b) 600 (c) 800 (d) 900
19. 19.Find the smallest number bigger than 10 that leaves a remainder of 2 when divided by 8, 10 or 3.
20. 20.The HCF of two numbers is 5 and their LCM is 70. One of the numbers is 10. What is the other number?
21. 21.3/4 of 44 + 3 × 3 =
22. 22.What is the smallest number you must take away from 859 so that it divides exactly by 3?
23. 23.A hall floor is 225 cm long and 135 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
24. 24.The ratio of boys to girls in a class is 1 : 6. There are 10 boys. How many girls are there?
25. 25.83 − 32 ÷ 4 × 7 =
26. 26.Find the third proportional to 4 and 12 (that is, 4 : 12 = 12 : ?).
27. 27.If 6 kg of rice costs ₹480, how many kg can you buy for ₹560?
28. 28.What is the smallest number you must add to 639 so that it divides exactly by 11?
29. 29.(5 + 14) × 6 − 6 =
30. 30.Find the LCM of 7, 6 and 5.
31. 31.Find the LCM of 12 and 18.
32. 32.3 painters can paint a school in 7 days. How many days would 7 painters take, working at the same speed?
33. 33.46 + 10 × 6 − 45 =
34. 34.Two tanks hold 75 litres and 125 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
35. 35.Which is closest to 98 + 299 + 199? (a) 600 (b) 700 (c) 800 (d) 500
36. 36.The ratio of boys to girls in a class is 6 : 1. There are 42 boys. How many girls are there?
37. 37.Find the LCM of 30 and 42.
38. 38.Rahul takes 30 seconds and Meera takes 75 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?
39. 39.Three temple bells ring every 5, 12 and 30 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
40. 40.A hall floor is 200 cm long and 125 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?

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