It was Diwali day. A day to exchange gifts. Two fathers gave
their sons some money. One father gave his sons counted their money; they found
that between them they had become richer by only Rs. 150/-
How do you explain this?
Answer: One of
the fathers is the son of the other father. The problem posed would seem as if
there are altogether four persons concerned. But that is not so. The three
persons are grandfather, father and son. The grandfather gave his son Rs. 150
/- and the latter passed on Rs. 100/- of them to the grandson (i.e. his son).
Thus increasing his own money by Rs. 50/-
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