February 23, 2009
(Proposed by Gus and Isaac, grade 3)
Can you find a way to break up this square into identical pieces so that each piece contains one red dot and one black dot?
* Feb 23 solution Solution to red dot-black dot problem
(Proposed by Gus and Isaac, grade 3)
Can you find a way to break up this square into identical pieces so that each piece contains one red dot and one black dot?
* Feb 23 solution Solution to red dot-black dot problem