180 Days of Ideas for Discussion in Math Class. (as of 9July2014, we're in overtime!)
Last brain buster before end of term. Tough one. Can you solve it? https://t.co/fj90odpFie #mathchat #mathschat pic.twitter.com/aDWSTmGP2Z — Ed Southall (@edsouthall) July 13, 2014
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