Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 374 · 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.What is the smallest number you must take away from 292 so that it divides exactly by 12?
2. 2.Two tanks hold 180 litres and 160 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
3. 3.Round 67.67 to one decimal place. =
4. 4.A hall floor is 280 cm long and 80 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
5. 5.What is the smallest number you must take away from 324 so that it divides exactly by 8?
6. 6.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?
7. 7.67 − 8 ÷ 2 × 9 =
8. 8.49 + 10 × 12 − 31 =
9. 9.47 + 8 × 11 − 16 =
10. 10.Round 35997 to the nearest hundred.
11. 11.Three temple bells ring every 8, 20 and 12 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
12. 12.Three temple bells ring every 5, 10 and 24 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
13. 13.What is the smallest number you must take away from 487 so that it divides exactly by 3?
14. 14.10/11 + 7/12 =
15. 15.2 × (12 − 8) + 55 ÷ 5 =
16. 16.Three temple bells ring every 15, 24 and 20 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
17. 17.If 4 mangoes cost ₹16, how much do 12 mangoes cost (in ₹)?
18. 18.Three temple bells ring every 9, 5 and 10 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
19. 19.Find the LCM of 14 and 12.
20. 20.The ratio of boys to girls in a class is 5 : 2. There are 10 boys. How many girls are there?
21. 21.Two tanks hold 120 litres and 160 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
22. 22.Write 1/2 as a percent.
23. 23.Divide ₹403 between Aditya and Arjun in the ratio 9 : 4. How much does Aditya get (in ₹)?
24. 24.Find the LCM of 7, 11 and 2.
25. 25.Three temple bells ring every 10, 8 and 15 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
26. 26.Which is closest to 502 × 60? (Round each number first.) (a) 60000 (b) 30000 (c) 300000 (d) 3000
27. 27.(10 + 15) × 9 − 14 =
28. 28.Write 27/50 as a percent.
29. 29.The HCF of two numbers is 6 and their LCM is 210. One of the numbers is 42. What is the other number?
30. 30.What is the smallest number you must take away from 435 so that it divides exactly by 13?
31. 31.21 + 4 × 3 − 1 =
32. 32.What is the smallest number you must add to 653 so that it divides exactly by 4?
33. 33.What is the smallest number you must take away from 830 so that it divides exactly by 12?
34. 34.21.7 ÷ 7 =
35. 35.Two tanks hold 15 litres and 40 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
36. 36.What percent of 25 is 18?
37. 37.Which is closest to 601 × 30? (Round each number first.) (a) 36000 (b) 180000 (c) 1800 (d) 18000
38. 38.If 6 notebooks cost ₹306, how much do 15 notebooks cost (in ₹)?
39. 39.A car goes 156 km on 12 litres of petrol. How far can it go on 15 litres (in km)?
40. 40.What is the smallest number you must take away from 113 so that it divides exactly by 6?

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