Lucia is a wonderful grandmother and her age is between 50 and 70. Each of her sons have as many sons as they have brothers. Their combined number gives lucia's present age. What is the age?
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You have to find a square number between 50 and 70
Answer is 64
Answer is 64
sudevrv:
her age is combined age of no:of sons and each son as sons equal to no: of his brothers. So if n is no: of her sons, each son will have n-1 kids. so total count becomes n+n(n-1) which is n^2
so basically you have to find a square number between 50 and 70, which happens to be 64. so she has 8 sons
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