Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 398 · 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 28 have?
2. 2.Rahul scored 6 marks out of 20 in a test. What percentage did Rahul score?
3. 3.Three temple bells ring every 15, 6 and 9 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
4. 4.Which is closest to 300 × 88? (Round each number first.) (a) 270000 (b) 2700 (c) 27000 (d) 54000
5. 5.The ratio of boys to girls in a class is 2 : 3. There are 10 boys. How many girls are there?
6. 6.Divide ₹590 between Vivaan and Kavya in the ratio 9 : 1. How much does Vivaan get (in ₹)?
7. 7.Which is closest to 797 × 61? (Round each number first.) (a) 96000 (b) 4800 (c) 48000 (d) 480000
8. 8.The ratio of boys to girls in a class is 1 : 5. There are 6 boys. How many girls are there?
9. 9.Two tanks hold 50 litres and 40 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
10. 10.How many factors does 58 have?
11. 11.3 × (25 − 7) + 40 ÷ 4 =
12. 12.Two tanks hold 20 litres and 25 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
13. 13.3.27 + 7.1 =
14. 14.Find the HCF of 27 and 18.
15. 15.Find the LCM of 6, 10 and 5.
16. 16.A hall floor is 140 cm long and 60 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
17. 17.What is the smallest number you must take away from 509 so that it divides exactly by 13?
18. 18.4/12 − 2/10 =
19. 19.What is the smallest number you must take away from 437 so that it divides exactly by 11?
20. 20.A hall floor is 315 cm long and 180 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
21. 21.1/4 of 20 + 7 × 2 =
22. 22.3 : 15 = 12 : ?
23. 23.Which of these numbers divides exactly by 8? (a) 8709 (b) 4499 (c) 6360 (d) 1595
24. 24.Divide ₹150 between Karan and Rahul in the ratio 9 : 1. How much does Rahul get (in ₹)?
25. 25.The HCF of two numbers is 3 and their LCM is 30. One of the numbers is 15. What is the other number?
26. 26.If 9 kg of rice costs ₹477, how many kg can you buy for ₹742?
27. 27.1/3 − 2/9 =
28. 28.A car goes 26 km on 2 litres of petrol. How far can it go on 31 litres (in km)?
29. 29.A hostel has enough food for 3 students for 20 days. How many days will the same food last for 10 students?
30. 30.Which of these numbers divides exactly by 3? (a) 3352 (b) 2414 (c) 4532 (d) 7854
31. 31.The ratio of boys to girls in a class is 2 : 3. There are 18 boys. How many girls are there?
32. 32.If 7 kites cost ₹322, how much do 2 kites cost (in ₹)?
33. 33.Nisha takes 72 seconds and Ananya takes 54 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?
34. 34.Find the LCM of 5, 14 and 7.
35. 35.7/9 − 1/7 =
36. 36.A car goes 51 km on 3 litres of petrol. How far can it go on 31 litres (in km)?
37. 37.What is 30% of 100?
38. 38.A car goes 48 km on 3 litres of petrol. How far can it go on 18 litres (in km)?
39. 39.Two tanks hold 360 litres and 315 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
40. 40.The HCF of two numbers is 3 and their LCM is 18. One of the numbers is 6. What is the other number?

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