How many squares are there on a checkerboard?
Size of square
1x1
2x2
3x3
4x4
5x5
6x6
7x7
8x8
Total
Number of squares
Solution:
Solution found on the Teaching Children
Mathematics TCM Blog website:
http://www.nctm.org/publications/blog/blog.a
spx?id=42015&blogid=599514
Ralph Connelly is Professor Emeritus in the
Faculty of Education at Brock University in
Ontario, where he taught elementary math
methods courses for 30+ years and is an active
member of NCTM.