All eyes are on London for the start of the 2012 Olympics, so today's mentalfloss.com Brain Game Free-for-all Friday challenge tests your knowledge of the most recognizable Games symbol. Good luck:

Name the colors of each of
the five interlocking rings
that appear on the Olympic flag.

Here are the ANSWERS.

THE ANSWERS:

(from left to right): BLUE, YELLOW, BLACK, GREEN, RED.

Thanks for playing, and have a great weekend!