Did you know: As much as half the population doesn't know that zero is an even number? And that this can cause problems in cases like gas-rationing based on license plates' last digit (as happened here in NYC last fall after Hurricane Sandy).
http://en.wikipedia.org/wiki/Parity_of_zero
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ReplyDeleteHa, that's pretty lunatic. I'll leave it here for laughs.
DeleteOf course, the key gap is to leave a blank where the definition should go. Math is always about starting with a careful definition.