A man had a room with only one window in it. It was a square window, 1 metre high and 1 metre wide (see diagram). Unfortunately, the man had sensitive eyes and the window let in too much light. The man sent for a builder, and told him to alter the window so that it let in half the amount of light. To make the matter especially tricky, the man insisted that the resulting window also had to be square, and 1 metre high and 1 metre wide. The builder isn’t allowed to use curtains, or shutters, or coloured glass. How did the builder solve the problem?
As ever, please do NOT post your answers, but do say if you think you have solved the puzzle and how long it took. Solution on Monday.
I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for theKindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.