You are given 50 tiny steel balls and a small, but very exact,
balancing scale. Each of the balls weighs 15 grams, with only one weighing 2 grams more than the rest. Can you, by using the scale only four times, find and isolate this oversized steel ball? 

What number?  ooooo What is the next number in this row of numbers? 

The King of Persia  ooooo The checkerboard has 64 squares. Legend tells us that it was designed
in ancient times by a Persian and that his king was so delighted with the
new game that he promised the inventor any gift he should wish as a reward
(perhaps excluding the royal princess). 

You're saying?  ooooo What comes once in a minute, twice in a moment, but never in a thousand years? 

Machinery  ooooo 'One machine can do the work of fifty ordinary men. No machine can do the work of one extraordinary man.' (Elbert Hubbard) 