Lucia is a wonderful grandmother.Her age is b/w 50 to 70.Each of her sons have as many sons as they have brothers.Their combined number gives Lucia's present age?what is her age?
Choose the correct option:
A) 85  B) 55  C) 84  D) 64  E) 62
If she has x sons   each son has x-1 brothers.   Total no of grandchildren=x(x-1)   Total No OF Sons+Grandchildren= x+x(x-1)=x^2   =&gt;Lucia's age is a perfect square between 50 and 70. The only number that satisfies this condition is 64.   ANSWER:64
<result>D</result>
Lucia is a wonderful grandmother.Her age is b/w 50 to 70.Each of her sons have as many sons as they have brothers.Their combined number gives Lucia's present age?what is her age?