This game is a simple revision of the traditional card game of war. This fast-paced card game challenges players to quickly perform mathematical operations in their head to beat their opponent. Each player is dealt an equal number of cards from the deck, which they keep face down in a pile. When the players say “Go!”, each player flips over the top card from their own deck and show each other their card. The first player to call out the sum of the cards takes the set of cards and sets them aside. The players immediately flip over the next top cards in their deck and repeat. The player with the most amount of cards when the decks are exhausted wins.