function rand(min:Number, max:Number, dead:Number):Number {

        var deadMin:Number = Math.floor(min / dead);

        var deadMax:Number = Math.ceil(max / dead);

        return Math.max(min, Math.min(max, deadMin + Math.floor(Math.random() * (deadMax - deadMin)) * dead + Math.ceil(Math.random() * (dead - 1))));

}

trace(rand(0, 29, 10));