Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 401 · 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. 1.11 painters can paint a school in 27 days. How many days would 9 painters take, working at the same speed?
2. 2.What is the smallest number you must take away from 230 so that it divides exactly by 13?
3. 3.Find the smallest number bigger than 15 that leaves a remainder of 4 when divided by 9, 15 or 5.
4. 4.Which is closest to 903 × 40? (Round each number first.) (a) 36000 (b) 3600 (c) 72000 (d) 360000
5. 5.If 6 kg of rice costs ₹252, how many kg can you buy for ₹378?
6. 6.What percent of 200 is 10?
7. 7.(13 + 7) × 2 − 10 =
8. 8.Rohan takes 72 seconds and Zoya takes 80 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?
9. 9.Find the third proportional to 2 and 8 (that is, 2 : 8 = 8 : ?).
10. 10.Divide ₹840 between Rohan and Rahul in the ratio 7 : 8. How much does Rahul get (in ₹)?
11. 11.Round 94.79 to one decimal place. =
12. 12.Find the LCM of 9, 6 and 15.
13. 13.Find the LCM of 6, 7 and 12.
14. 14.Which is closest to 503 × 81? (Round each number first.) (a) 400000 (b) 4000 (c) 80000 (d) 40000
15. 15.Divide ₹340 between Kabir and Ananya in the ratio 3 : 7. How much does Kabir get (in ₹)?
16. 16.60% of a number is 231. What is the number?
17. 17.Round 99.34 to one decimal place. =
18. 18.The HCF of two numbers is 5 and their LCM is 200. One of the numbers is 40. What is the other number?
19. 19.The ratio of boys to girls in a class is 7 : 6. There are 14 boys. How many girls are there?
20. 20.Farhan takes 60 seconds and Aarav 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?
21. 21.If 2 kg of rice costs ₹154, how many kg can you buy for ₹770?
22. 22.Two tanks hold 35 litres and 30 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
23. 23.Round 85076 to the nearest thousand.
24. 24.Which of these numbers divides exactly by 6? (a) 7844 (b) 8582 (c) 1700 (d) 4680
25. 25.What is the smallest number you must add to 114 so that it divides exactly by 13?
26. 26.9.9 × 3 =
27. 27.4 × (28 − 21) + 16 ÷ 2 =
28. 28.Which of these numbers divides exactly by 6? (a) 5334 (b) 5265 (c) 4329 (d) 2758
29. 29.2/4 × 7/8 =
30. 30.9.5 × 5 =
31. 31.Which is closest to 496 × 41? (Round each number first.) (a) 2000 (b) 40000 (c) 200000 (d) 20000
32. 32.What is the smallest number you must take away from 245 so that it divides exactly by 6?
33. 33.Round 79759 to the nearest ten.
34. 34.What percent of 400 is 316?
35. 35.Divide ₹325 between Rohan and Rahul in the ratio 7 : 6. How much does Rohan get (in ₹)?
36. 36.What is the smallest number you must add to 736 so that it divides exactly by 12?
37. 37.7.85 + 2.4 =
38. 38.A hall floor is 150 cm long and 100 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
39. 39.A hall floor is 225 cm long and 180 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
40. 40.If 12 bottles of juice cost ₹300, how much do 6 bottles of juice cost (in ₹)?

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