I am looking for a method of making random numbers that is off-line and is also independent of specialist equipment like a Geiger counter.
closed as too broad by e-sushi, Maarten Bodewes - owlstead, figlesquidge, Gilles, rath Apr 26 at 16:18
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Do a long jump, measure the distance in millimeters, take it modulo 10.
Repeat 100 times.
Another idea: use clock timer that shows milliseconds, start it and then turn off after some time, look at the last digit.