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?