Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 991 · 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. 1.4 : 12 = 36 : ?
2. 2.What is the smallest number you must take away from 748 so that it divides exactly by 7?
3. 3.6 : 10 = 36 : ?
4. 4.Three temple bells ring every 24, 10 and 20 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
5. 5.Find the LCM of 6 and 9.
6. 6.How many factors does 30 have?
7. 7.A hall floor is 400 cm long and 250 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
8. 8.15% of a number is 21. What is the number?
9. 9.Which is closest to 701 × 29? (Round each number first.) (a) 210000 (b) 42000 (c) 21000 (d) 2100
10. 10.7 painters can paint a school in 30 days. How many days would 5 painters take, working at the same speed?
11. 11.6 × (12 − 5) + 42 ÷ 7 =
12. 12.Find the HCF of 30 and 80.
13. 13.What is the smallest number you must add to 297 so that it divides exactly by 13?
14. 14.Two tanks hold 45 litres and 10 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
15. 15.A car goes 46 km on 2 litres of petrol. How far can it go on 5 litres (in km)?
16. 16.The HCF of two numbers is 5 and their LCM is 225. One of the numbers is 45. What is the other number?
17. 17.Two tanks hold 280 litres and 360 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
18. 18.How many factors does 16 have?
19. 19.Three temple bells ring every 4, 12 and 8 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
20. 20.If 9 kg of rice costs ₹603, how many kg can you buy for ₹536?
21. 21.2/3 × 3/6 =
22. 22.A hall floor is 300 cm long and 250 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
23. 23.Which of these numbers divides exactly by 3? (a) 1348 (b) 7468 (c) 2783 (d) 8871
24. 24.8 : 15 = 48 : ?
25. 25.Manav takes 30 seconds and Rahul 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?
26. 26.If 4 kites cost ₹204, how much do 11 kites cost (in ₹)?
27. 27.Which of these numbers divides exactly by 8? (a) 8687 (b) 2592 (c) 1618 (d) 1762
28. 28.How many factors does 14 have?
29. 29.Which is closest to 996 ÷ 19? (a) 500 (b) 25 (c) 50 (d) 100
30. 30.Which is closest to 402 + 397 + 100? (a) 800 (b) 900 (c) 1100 (d) 1000
31. 31.5 : 7 = 15 : ?
32. 32.Two tanks hold 70 litres and 60 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
33. 33.Divide ₹148 between Karan and Aarav in the ratio 3 : 1. How much does Aarav get (in ₹)?
34. 34.What is 3/4 of 44 litres?
35. 35.Which is closest to 803 × 71? (Round each number first.) (a) 560000 (b) 5600 (c) 112000 (d) 56000
36. 36.Find the smallest number bigger than 15 that leaves a remainder of 3 when divided by 15, 5 or 4.
37. 37.How many factors does 27 have?
38. 38.A hall floor is 240 cm long and 210 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
39. 39.What is 3/8 of ₹80?
40. 40.What is the smallest number you must add to 923 so that it divides exactly by 3?

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