My friend asked me this question: “my grandmother’s age is a perfect square. Also, it is equal to the difference the square of my father’s age and the square of my mother’s age. My father is one year older than my mother. Can you tell me how old my mother is?”

it can also be

625-576=49

3,4,5 also works!

if we consider grandmother to be extra ordinarily healthy

than her age can be 121

mother’s age 60

fathers age 61

The required ans is 40 year

41^2 – 40^2 = 81

196-169=25

friends i know its awkward but it is taking into consideration all the constraints