As part of an entry test into BrainBashers academy a special test was devised.
50 applicants were placed into a darkened room, each with a coloured baseball cap upon their head. These baseball caps came in two colours, red and green, however, no applicant knew the colour of their own cap. The applicants were not allowed to communicate in any way.
Their task was to assemble outside, in a line, with those wearing red caps on one side and those wearing green on the other. How did this achieve this?
The first two out stood anywhere they liked. The next applicant looked at the line so far, if all of the caps were the same colour, they stood at either end of the line. Otherwise they stood at the position where the colours of the caps changed from red to green.