So here are a few things I've tweeted or written about:
2010/04/21 : There is a set of five words in English that differ only in the vowel. Your challenge is to find them. Is there more than one set?
2010/04/19 : Maths factlet: The fraction 16/64 can be simplified by cancelling the 6's, and 19/95 can be simplified by cancelling the 9's.
2010/04/16 : The speed of sound (in air at sea level) is almost exactly a million times slower than the speed of light. Roughly 1ft/ms vs 1ft/ns. Coincidence, or conspiracy ...
2010/04/14 : An ounce of gold weighs more than an ounce of feathers.
2010/04/12 : On a 2GHz computer, in one clock tick, light travels about 6 inches
There are pi seconds in a nano-century (to within 0.45% or so)
10! seconds is exactly 6 weeks
[ sqrt(2)-1 ]^n is always the difference of the sqrts of consecutive integers
So (sqrt(2)-1)^3 = sqrt(50)-sqrt(49)
This means there are infinitely many numbers that are both triangular and square!
... because the 2 numbers you generate are 1 apart and are always a square and 2 lots of a square. Multiply them and /2: bingo!
This last from Tom Button
... what next?
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