1)The age of the grand lady is between 50-70 where each of her son has as many sons as many brothers he has. The grand lady's age is equal to the number of sons and grand sons. What is the age of the grand lady. Ans: 64 years

Indu

• Jul 11th, 2006

 

let number of sons be x
each son has x-1 kids

total number of grandsons = x(x-1)

x + x(x-1) < 70
x + x(x-1) > 50

x^2 < 70, x^2 > 50
x = 8

Age of the lady = x^2 = 64