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Ball paradox Activity

by David, 30 November 2015 | 0 comments

Several balls of differeng sizes in a row.

When there’s lots of balls in a line, does the order of balls affect the length of the line? Time to investigate!

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Birthday paradox Activity

by David, 3 September 2013 | 5 comments

A wrapped gift, a party hat, decorative ribbon, and a cupcake with a lit birthday candle on a calendar. ©iStock.com/Double_Vision

How likely is it that at least two people out of 30 will share a birthday?

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