Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 45 · 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.Find the LCM of 12 and 10.
2. 2.Three temple bells ring every 20, 4 and 24 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
3. 3.3/12 × 2/3 =
4. 4.Which is closest to 301 × 51? (Round each number first.) (a) 150000 (b) 15000 (c) 1500 (d) 30000
5. 5.Find the third proportional to 9 and 18 (that is, 9 : 18 = 18 : ?).
6. 6.Divide ₹533 between Rahul and Manav in the ratio 9 : 4. How much does Manav get (in ₹)?
7. 7.Divide ₹128 between Arjun and Nisha in the ratio 3 : 1. How much does Arjun get (in ₹)?
8. 8.17 − 63 ÷ 9 × 2 =
9. 9.1/2 of 6 + 2 × 3 =
10. 10.The ratio of boys to girls in a class is 8 : 1. There are 64 boys. How many girls are there?
11. 11.Two tanks hold 120 litres and 100 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
12. 12.If 3 kg of rice costs ₹240, how many kg can you buy for ₹1120?
13. 13.What is 80% of 505?
14. 14.What is the smallest number you must add to 402 so that it divides exactly by 13?
15. 15.Dev takes 48 seconds and Manav 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?
16. 16.10 ÷ 5 × 3 + 3 =
17. 17.Three temple bells ring every 24, 20 and 5 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
18. 18.A hostel has enough food for 12 students for 29 days. How many days will the same food last for 6 students?
19. 19.Three temple bells ring every 8, 6 and 30 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
20. 20.A hall floor is 225 cm long and 90 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
21. 21.4 : 14 = 8 : ?
22. 22.Which is closest to 1602 ÷ 39? (a) 20 (b) 80 (c) 400 (d) 40
23. 23.7 : 10 = 35 : ?
24. 24.Farhan scored 20 marks out of 80 in a test. What percentage did Farhan score?
25. 25.Find the third proportional to 2 and 4 (that is, 2 : 4 = 4 : ?).
26. 26.Two tanks hold 135 litres and 315 litres of milk. What is the biggest can (in litres) that can empty both tanks exactly, with no milk left over?
27. 27.Which of these numbers divides exactly by 3? (a) 6486 (b) 7066 (c) 6794 (d) 3160
28. 28.A hall floor is 300 cm long and 240 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
29. 29.What percent of 200 is 138?
30. 30.30 ÷ 3 × 9 + 21 =
31. 31.Divide ₹450 between Zoya and Meera in the ratio 5 : 4. How much does Zoya get (in ₹)?
32. 32.(4 + 4) × 5 − 14 =
33. 33.A hostel has enough food for 9 students for 4 days. How many days will the same food last for 3 students?
34. 34.Ananya takes 60 seconds and Kabir takes 36 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?
35. 35.50 ÷ 5 × 8 + 18 =
36. 36.Divide ₹48 between Meera and Karan in the ratio 1 : 5. How much does Meera get (in ₹)?
37. 37.Round 30.54 to one decimal place. =
38. 38.What percent of 250 is 135?
39. 39.Two tanks hold 320 litres and 120 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 9 and their LCM is 180. One of the numbers is 36. What is the other number?

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