If you have a standard deck of cards, how many hearts are in the deck?

A standard deck of cards contains four suits: hearts, diamonds, clubs, and spades. Each suit consists of 13 cards, which include the numbers 2 through 10, as well as the face cards: Jack, Queen, King, and Ace. Since the question specifically asks about the number of hearts in the deck, and there are 13 cards in the hearts suit, the correct answer is that there are 13 hearts in a standard deck.

This knowledge is based on the structure of a typical 52-card deck, where each suit is equally represented, confirming that the number of hearts is indeed 13.