Divyansh's age is in the ratio 9 : 10 to the age of his sister Sara. Ten years ago, the ratio of their ages was 4 : 5. What is present age of Divyansh?

18 years

Divyansh's age is in the ratio 9 : 10 to the age of his sister Sara. Ten years ago, the ratio of their ages was 4 : 5

According to the question,

                 Divyansh        Sara

Present         9          :        10

Old               4           :          5

Difference between old and new ratio = 9-4 = 5

So, 5x = 10

x = 2

and 9x = 18