Q .The ratio of present age of Sita to the Gita is 5 : 6 . 15 years ago , the ratio of age of Sita to that of Gita at that time was 2 : 3 . What is Gita's present age?

First Trick-

SitaGita

Present age56

15 years ago 23

If difference between ratio are same like-
5 - 2 = 3 = 15 years

So present age of Gita = 15 / 3 * 6 = 30

Present age of Gita =30 years