Puzzle of the Week

Ok a slightly easier one - or a more classical lateral thinking question anyway:

An explorer walks one mile due South, turns and walks one mile due East, turns again and walks one mile due North.  He finds himself back where he started.  He shoots a bear.  What colour is the bear?

Puzzle of the Week

When a secondhand bookstore holds a sale with a 10 percent reduction in prices, it makes an 8 percent profit on each book sold. What was the profit before the sale?

Puzzle of the Week

If to a rope, passed over a frictionless pulley, is suspended a ten-pound weight that exactly balances a monkey at ther other end, what happens to the weight if the monkey attempts to climb the rope?

Puzzle of the Week

Mum gave me a Puzzle of the Day calendar for Christmas.  I thought I might post some of these, perhaps one a week?

Today's puzzle (no its not the 1 Jan puzzle) is:

Ten red socks and ten blue socks are all mixed up in a dresser drawer.  The twenty socks are exactly alike except for their colour.  The room is in pitch darkness and you want two matching socks.  What is the smallest number of socks you must take out of the drawer in order to be certain that you have a pair that matches?