Domino

Reasoning

A full standard double-six domino set consists of 28 unique tiles. The image displays 27 tiles. I have cataloged the tiles present in the image and identified the one missing piece: Tiles Present: [6, 6], [6, 5], [6, 4], [6, 3], [6, 2], [6, 1] [5, 5], [5, 4], [5, 3], [5, 2], [5, 1], [5, 0] [4, 4], [4, 3], [4, 2], [4, 1], [4, 0] [3, 3], [3, 2], [3, 1], [3, 0] [2, 2], [2, 1], [2, 0] [1, 1], [1, 0] [0, 0] Missing Tile: [6, 0] All pairs from 0 to 6 are present except for the combination of 6 and 0.

Reasoning

The excluded domino is number 0 and 0

Reasoning

After carefully examining the image and identifying all 27 dominoes present, all combinations from the double-six set are accounted for except the [4|5] domino.

Reasoning

I inspected the 27 tiles and every other pair from the double-six set is present; the only double not shown is the double-six tile (6,6).

Reasoning

By systematically checking all 28 possible dominoes in a standard double-six set (all combinations of numbers 0-6), I identified that the domino [4, 4] is not present in the image. All other 27 dominoes can be accounted for among the tiles shown.

Reasoning

The missing domino is 5 and 6, as both numbers appear 6 times in the 27 dominoes, indicating the absence of the 5-6 domino in the standard set.