[JinX11]

I believe it's something like this:

You pick 6 numbers, the first 5 numbers from a pool of 1-56 (no duplicates), the last number (the "Mega" ball) from a pool of 1-46.

$1 per ticket. Payout schedule:

5 + Mega Ball = Jackpot (currently $225 mill.)
5 (no Mega Ball) = $250,000
4 + Mega Ball = $10,000
4 (no Mega Ball) = $150
3 + Mega Ball = $150
2 + Mega Ball = $10
3 (no Mega Ball) = $7
1 + Mega Ball = $3
0 + Mega Ball = $2