[da_chicken]

The 2, 4, 8, and 10 of all suits are typically rotationally symmetrical.

[joshvm]

Only if your deck has a rotationally symmetric back. A lot of decks are oriented with pictures or logos. Tarot decks almost always do to allow inverted readings (and you'd get a few more bits out from the major arcana).

[a_t48]

ah, whoops, yes