Domino

After examining all the dominoes present on the board, the domino with a 0 and a 2 is not found. Therefore, it must be the excluded domino.

Checking the board against all 28 unique double-six dominoes, every combination appears except the double-two tile, which is not present.

The board shows the other doubles—0-0, 1-1, 3-3, 4-4, 5-5, and 6-6—so 2-2 is the missing domino.

Reading the pip counts from the image is uncertain, but after tallying the dominoes I could identify, the 3-4 combination did not appear, so it is my best guess...

The board shows 27 dominoes. Checking all combinations, every 0-x pairing except 0-1 appears (0-0, 0-2, 0-3, 0-4, 0-5, 0-6 all found), and no domino with a blan...

The board contains 27 dominoes. Checking the 3-pip combinations, the board includes 0-3, 1-3, 2-3, 3-4, 3-5, and 3-6, but there is no domino with 3 pips on both...