Math Fluxx is all about the numbers Players use positive integers (whole numbers) in their quest to achieve a very mathematical goal — but it&s not just putting 4 & 2 together to achieve the 42 goal (for example) as Math Fluxx also features the Plan B Meta Rule Plan B puts special victory rules into play which give you a second way to win & require even more arithmetical acumen (eg " Plus Victory" lets you win if your keepers add up to the current goal) With Math Fluxx the fun is exponential!