Question

2. Factorise:x4 – (x – z)4
3. If the earning of 30 workers for 12 days is Rs. 18900, find the earnings of
38 workers for 10 days.
4. Chelsea FC won 15 matches out of the total number of matches they
played. If they lost 25% of the matches of the total number of matches,
then how many matches did the play in all?
5. Find the compound interest on Rs. 6000 at 10% p.a. for 2ଵ
ଷ
years.
6. A trader marked an article for Rs. 12. He allowed a discount of 10% for
cash down and still gained 8%. Find the cost price of the article.
7. If 6x = 292– 232
, then find the value of x.

10. The ages of Ujaan and Aznan are in the ratio of 9: 7. Ten years ago their
ages were in the ration 7: 5. Find their present ages.

Answer 1

pls see image answer is given

Answer 2

Answer:19950

Step-by-step explanation:

30--------12----------18900

1-----------12----------630

1-----------1-------------52.5

38--------10-----------52.5x38x10=19950