It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

Can you decipher the two rows to find the hidden word?

What can jump higher than a building?

A bomb exploded in a room full of married couples and no one died. How?

I make two people out of one. What am I?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Can you place three balls such that the equation shown in the picture holds true?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?