The Father

Warning: this puzzle involves mature themes that are inappropriate for younger audiences. If you are not an adult, please skip this puzzle.

Mary is 21 years older than her son. After 6 years, she will be 5 times older than him. Where is the father?

Let M be the age of the mother and S be the age of the son. We have M = S + 21 and M + 6 = 5(S + 6). We solve the system and get S= -3/4, i.e. minus 9 months. Therefore right now the son just got conceived and the father is with the mother.

Unknown Author

We do not know where this puzzle originated from. If you have any information, please let us know via email.