Domino

The excluded domino is number 0 and 0

A standard double-six domino set consists of 28 unique tiles ranging from [0,0] to [6,6]. After identifying all 27 dominoes present in the image, the missing tile is the [6,6] double-six.

After systematically examining all 27 dominoes shown in the image and comparing them against the complete standard double-six set of 28 tiles, the domino [4, 4] is missing. This is a double domino (both sides showing 4 dots) which should be present in a complete set but is not visible anywhere in the image.

I systematically catalogued all visible dominoes in the image. A standard double-six set has 28 tiles. After identifying all 27 visible dominoes and checking which combination from 0-0 through 6-6 is missing, the tile [0,3] (blank-three) is not present in the image.

After carefully examining the image and identifying all 27 dominoes present, the double-four domino ([4-4]) is the only one missing from the standard double-six set.

I identified all 27 tiles in the image and the only domino missing from the full double-six set is the double-six (6-6).

A standard double-six domino set contains 28 unique tiles with each number 0-6 appearing exactly 8 times across all tiles. The domino [6,6] is the only tile with 12 total pips (6 on each half). By examining all 27 dominoes in the image, the maximum pip count visible on any domino is 11 (from [5,6]). No domino shows the distinctive 6-6 pattern (12 dots total). Counting occurrences: [0,0], [0,1], [0,2], [0,3], [0,5], [0,6] account for the ’0’ series; [1,1], [2,2], [5,5] account for three doubles; high-count dominoes like [2,6], [3,6], [4,5], [5,6] are present but [6,6] with its unique 12-pip configuration is absent. Therefore, the missing domino is [6,6].