Five Minute Math

This M&M math is from Steve Heller, I adapted some of it for younger kids. Get some M&Ms. (I used coins since we have lots of pen...

I tried to run a dollar auction at dinner yesterday. At first the kids (13-year-olds) wouldn't bite. Finally they started bidding. T...

A few days ago we explored the St. Petersberg Paradox. Here's how I stated it: We'll play a game involving coin flips, and I'...

Today we did zero-knowledge sudoku .

The inverse of 1- x 2 can be calcuated two ways. First way: We know 1/(1- y )=(1+ y + y 2 + y 3 +...) so substitute y = 2x , and it come...

Treating polynomials as abstract symbolics entities (rather than as a formula into which you substitute a real number for x . Q: What do yo...

My 3-year old child wanted to do five-minute math. I said, OK, I grabbed the marker, and she said "write a 3". So I wrote a 3. ...