Can you?

Just sent John the answer to this puzzle. I managed to solve it. Can you?

Comments

[Simon]

All I can think of is that you split them into two equal groups and then toss each coin a very large number of times until there is very little chance of their not being a 50-50% split of red and black in each pile? Even if the chance of red and black coming up when you toss a red-black coin isn't equal the number of red up coins in each pile should be the same as long as the chance of red up is the same for each coin.

Either than or stand them all on their edge so that there are no coins with either face up?

[Simon]

Oh no, I got it now :) tricky

[Rob]

To make it easier, just try with five rather than 500.