Domino

A double-six domino set has 28 unique dominoes. By carefully examining all the dominoes present in the image and comparing them to a complete set, the domino wi...

Checking the dominoes by pip combinations, all six dominoes containing 0 are present except the 0-5 combination. Therefore, the missing domino is [0, 5].

Comparing the visible dominoes against the complete double-six set, the 0-5 domino is the pair that does not appear on the board.

Reading the pip counts from the image is uncertain, but the doubles I could identify were 0-0, 2-2, 4-4 and 6-6, with 1-1, 3-3 and 5-5 not clearly appearing. Of...

The board shows 27 dominoes. Systematically checking all 28 combinations 0-0 through 6-6, every domino appears except 0-5. Blank halves occur 7 times (0-0,0-1,0...

I checked the board against the 28 dominoes of a double-six set. After accounting for the only ambiguous/near-duplicate placements, every pair except 0-5 can be...