Related Clues:

• Adds one to three, e.g.
• Start of some games
• Some roulette bets
• Roulette bets
• Odds alternative
• Coin toss call, e.g.
• Smooths
• The odds are against them
• Toss-up quote
• 12/24 and 12/31
• Hard-to-predict outcome
• Stabilizes
• 50-50 gamble
• One group of numbers to pick
• Levels (out)