Up to 4 players take 15 dominoes each, 5 or 6 take 12 each, 7 or 8 take 10 each. In friendly games, players normally just place their dominoes on edge in a row facing them. The remaining dominoes are termed "sleeping" tiles or "the boneyard".
Answer: There are 28 tiles in a double-six domino set. All tiles except the doubles belongs to two suits; they should not be counted twice. The tiles are: 0-0, 0-1, 0-2, 0-3, 0-4, 0-5, 0-6, 1-1, 1-2, 1-3, 1-4, 1-5, 1-6, 2-2, 2-3, 2-4, 2-5, 2-6, 3-3, 3-4, 3-5, 3-6, 4-4, 4-5, 4-6, 5-5, 5-6, 6-6.