A game of chance involves use of a pair of dice or other randomizing device to obtain a first number set, wherein a first wager immediately wins when the first number set from the dice/device adds up to one of the numbers in a selected Numbers Group or Wagering Zone. A winning wager, or portion of the winning wager, may be parlayed to a second tier wager to determine whether the next roll of the dice/device will produce a second number set that is the same as the first number set. The Wagering Zones may be incorporated/combined with traditional casino game layouts, for example, Craps, slot-machine, Blackjack, or Roulette types of layout. In many board or table embodiments, wagers, based on speculation of what will be the first number set and subsequent number sets, are placed directly on the playing surface, with second tier wagering zones provided to prevent confusion with others' “fresh” wagers on the subsequent rolls. In computer or electronic slot-machine embodiments, the programming/memory may serve to differentiate, monitor, and display first vs. second tier wagers. The ability to bet on both grouped numbers (in a first tier wager), and on individual numbers in a Target Set, in any gaming layout or platform, will increase player enthusiasm and observer excitement. The knowledge that a player may be paid for successfully wagering on a winning Numbers Group after only one roll of the dice, helps move the game along and also adds to the excitement of the game.