What are the odds of drawing the same card twice?

the probability you will get that same card again is 1/52. the combined probability is 1/1 * 1/52 = 1/52. the odds of getting that card again is the probability of getting that card again divided by the probability of not getting that card again.

When playing cards which direction do you deal?

Dealing is done either clockwise or counterclockwise. If this is omitted from the rules, then it should be assumed to be: clockwise for games from North America, North and West Europe and Russia; counterclockwise for South and East Europe and Asia, also for Swiss games and all Tarot games.

How can you make two piles of cards that are guaranteed to have the same number of face up cards?

You have to divide the deck into two piles so that number of cards facing up in both the piles are equal. You are allowed to flip any card as many times as you want, however, you can't tell whether a card is facing up or facing down by touching it.

How many 2 card combinations are there in a deck of cards?

There are 1326 distinct possible combinations of two hole cards from a standard 52-card deck in hold 'em, but since suits have no relative value in this poker variant, many of these hands are identical in value before the flop.