Carnival of Mathematics 69 (via JD2718)

Jonathan serves up plenty of fun in this month’s Carnival of Mathematics. And he will be hosting the Math Teachers at Play blog carnival in two weeks — submit your entries here.

Normally a Carnival of Mathematics opens with a discourse on its ordinal. But 69?

It is 1000101 in binary, 1011 base 4, 105 base 8, 45 in hex… If we used 32 as a base? 25. And that would be 15 in base 64.

69 is odd. But there are as many odd numbers as there are ________. I still love that! It is one of a bunch of surprises that Dave Richeson lists at Divisio …

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