Question

please answer it it is on ratio chapter​

Answer 1

98 is the answer i guess

Answer 2

So n is the sum of the ages 5 years from now. Hence the sum of ages today must be n−10. (Subtracting 5 years for each of the two)

Today their ages are in the ratio 5:7, so we can split the sum (n−10) into two number satisfying this ratio, which are -

512(n−10) and 712(n−10)

Observe that if you add these two, you get sum (n−10) and if you take their ratio you get 5:7. But for these to give you two integers, (n−10) must be divisible by 12. So here is what you need to check

Subtract 10 from each answer option n, to get (n−10)

Check which of these (n−10) are divisible by 12.

Hopefully only one of the given answer option satisfy this.