These math stumpers come from Marcy Cook's Primary Starters and Stumpers. The #s I write next to the stumpers are for me to remember which ones I have given to you. Enjoy trying to figure out the answers to these problems. Don't forget to comment.
Math Stumper #22
How many nines are there between 1 and 110?
Math Stumper #23
1+11+111=1111
Move one of these lines to make a true equation.
Math Stumper #25
Take the 1st dozen even counting numbers. Put them in pairs. The sums of the pairs should all be the same.
Friday, April 3, 2009
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