Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 980 · 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 2, 5 and 12.
2. 2.The ratio of boys to girls in a class is 1 : 7. There are 5 boys. How many girls are there?
3. 3.What is the smallest number you must take away from 883 so that it divides exactly by 9?
4. 4.A car goes 150 km on 6 litres of petrol. How far can it go on 10 litres (in km)?
5. 5.How many factors does 99 have?
6. 6.(11 + 18) × 2 − 20 =
7. 7.How many factors does 90 have?
8. 8.1/5 of 55 + 4 × 9 =
9. 9.A hall floor is 240 cm long and 150 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
10. 10.Three temple bells ring every 5, 6 and 18 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
11. 11.A hostel has enough food for 6 students for 23 days. How many days will the same food last for 3 students?
12. 12.The HCF of two numbers is 7 and their LCM is 168. One of the numbers is 56. What is the other number?
13. 13.If 10 erasers cost ₹510, how much do 18 erasers cost (in ₹)?
14. 14.A hall floor is 480 cm long and 300 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
15. 15.If 7 pens cost ₹308, how much do 11 pens cost (in ₹)?
16. 16.Which is closest to 297 × 59? (Round each number first.) (a) 1800 (b) 180000 (c) 18000 (d) 36000
17. 17.How many factors does 81 have?
18. 18.A car goes 120 km on 12 litres of petrol. How far can it go on 4 litres (in km)?
19. 19.Find the HCF of 98 and 42.
20. 20.Divide ₹390 between Farhan and Ishaan in the ratio 5 : 8. How much does Farhan get (in ₹)?
21. 21.The HCF of two numbers is 3 and their LCM is 105. One of the numbers is 15. What is the other number?
22. 22.Find the smallest number bigger than 12 that leaves a remainder of 5 when divided by 8, 9 or 12.
23. 23.A car goes 50 km on 2 litres of petrol. How far can it go on 24 litres (in km)?
24. 24.Which of these numbers divides exactly by 8? (a) 9975 (b) 1119 (c) 7276 (d) 4736
25. 25.Find the LCM of 6 and 10.
26. 26.Find the smallest number bigger than 8 that leaves a remainder of 2 when divided by 5, 8 or 3.
27. 27.What is the smallest number you must take away from 732 so that it divides exactly by 9?
28. 28.Arjun scored 14 marks out of 20 in a test. What percentage did Arjun score?
29. 29.Find the LCM of 10, 4 and 5.
30. 30.What is 1/2 of 14 students?
31. 31.Find the smallest number bigger than 12 that leaves a remainder of 4 when divided by 9, 10 or 12.
32. 32.Three temple bells ring every 12, 18 and 9 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
33. 33.Find the LCM of 35 and 40.
34. 34.5 painters can paint a school in 7 days. How many days would 7 painters take, working at the same speed?
35. 35.Three temple bells ring every 6, 9 and 15 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
36. 36.Which of these numbers divides exactly by 8? (a) 4642 (b) 2179 (c) 7920 (d) 1772
37. 37.How many factors does 48 have?
38. 38.What is the smallest number you must take away from 624 so that it divides exactly by 11?
39. 39.4 × (19 − 6) + 18 ÷ 3 =
40. 40.9 × (19 − 1) + 16 ÷ 4 =

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