MONTANA Montana law permits bars and taverns to have up to twenty video gaming devices that play either video online poker games or video keno. The machines are operated in partnership with the state and are not permitted to pay out in cash; instead they print out a receipt which must be taken to a cashier. Additionally, there are four Indian casinos which offer regular video online poker games and video keno machines. The minimum gambling age is eighteen. For tourism information call 800-VISIT-MT. The Most Important Mathematical Expression Ever Derived by Mankind The reason that this simple inequality is greater than anything Newton or Einstein came up with is that it answers the most fundamental question we face as poker players: whether to stay in a hand or fold. And the answer is immediately available because we've transformed our expected value equation into a form that is very easy to use at the poker table. Now all we have to do to figure out if calling a bet is good for us is to compare W/L with P/B. Those two ratios are called odds. Specifically, W/L, the ratio of our chance of winning to our chance of losing, is called 2cin.ning odd-s. And P/B, the ratio of the current pot size to the bet required to call, is called pot odds. You can express odds in several different ways: A/B, A:B, or the phrase "A-to-B" are all the same thing.