Today a mother is 21 years older than her son. In 6 years the child will be 5 times younger than his mother.

**Where is the father?**

**EYE**: It has a solution, think a bit.

#### Solution

Suppose the child has today * X* years and the mother is

*years*

**Y**- Therefore it is fulfilled that: X + 21 = Y

- The following will be accomplished within 6 years:

5 * (X + 6) = Y + 6

We replace * Y* in the second equation for the value it has in the first and we have:

5 * X + 30 = X + 21 + 6

Simplifying we have:

4 * X = -3

Where we deduce that:

X = -3/4

So the child is today -3/4 of a year or -9 months or what is the same 9 months to be born, so ... they are conceiving it at that time, therefore ...

The father has to be on top of the mother!