teh4dA tesseract moving along the 4D axis A 4D torus rotating on the 4D axis.. 4D, meaning the common 4 dimensions, is a theoretical concept in mathematics. It has been studied byWhen you play Permutation Bet, you cover all possible permutations of the 4D number you picked. For example, if you play Permutation Bet on 1133, you cover 1133, 1313,