Joe's age,Joe's sister's age and Joe’s father's age sums up to a century . When son is as old as his father ,Joe's sister will be twice as old as now. When Joe is as old as his father then his father is twice as old as when his sister was as old as her father . Age of her father is?
"There is nothing called attitude, its just the presence or absence of courage"
Sandeep Upadhyay
Each and every person in this world are having "constant mind"...DIFFERENTIATE others mind and INTEGRATE urs.MATHEMATICS SIMPLY MAKES YOU UNSTOPPABLE !!!