Google is giving away a number of Android-powered Nexus S phones for free!

All you need to do is follow @googlenexus and solve the puzzles for the day. You are limited to one guess per entry, submitting multiple guesses won’t work since your very Google will only accept your first submission.

The Google Nexus S contest is open to all legal residents of (where you need to be physically located at during the duration of the contest) in Australia, Austria, Belgium, Canada, Croatia, Czech Republic, France, Germany, Greece, Hong Kong, Ireland, Indonesia, Netherlands, Philippines, Russia, Singapore, Spain, South Korea, Switzerland, Taiwan, Thailand, the United Kingdom or the 50 United States and the District of Columbia.

Contest period is 12:00:00 A.M. Pacific Time (PT) Zone in the United States on April 28 2011 up to 11:59:59 P.M. PT on May 8 2011.

more info via the Official Challenge page, @googlenexus