To illustrate the over/under 2.5 meaning, check out the examples here. In football, you could wager on under 2.5 goals. Then your bet would need to finish with two or less goals to work. Alternatively, you can select over 2.5 goals. Three goals must be scored in total for this to win.
Is 0-0 odd or even in betting? In most betting contexts, the scoreline of 0-0 is considered an even outcome. In terms of betting markets that involve odd or even numbers, such as over/under bets or total goals bets, a 0-0 scoreline would typically be categorized as an even result.