My son had two problems from his Mathcounts practice that puzzled him last night. I thought it was best that he puzzled through one of the questions – what is 47 * 53. His question about this problem was simple – why would they even ask this question?

The other question required a little more review since we’ve not talked about exponents in a while:

Evaluate:

Unlike the first problem which really just involves learning a difference of squares trick, this problem actually connects to an interesting puzzle (and one that we’ve studied before):

## Comments

” what is 47 * 53. His question about this problem was simple – why would they even ask this question?”

I guess, the question is to check if students can come out a quick method:

47*53=(50-3)*(50+3)=2500-9=2491

maybe it is too easy for American kids 🙂