There is no definitive answer to this question as it depends on a number of factors, including the rules of the game being played and the specific deck of cards being used. Generally speaking, however, a 10 and an ace are considered blackjack cards, which means they can be used to make a hand.
If you are playing in a casino setting with standard blackjack rules, then using a 10 and an ace together would result in a hand that is worth 10 points.
