Odd Pop! Eye Test Challenge

Spot the odd number out before time runs out.

Every number in the grid looks identical. One of them isn't. A target number appears at the top of the screen — find the single tile that matches it, while every other tile taunts you with 3088, 3880, 3008. It's spot the difference, except the difference is one swapped digit.

The numbers are built from the digit pairs that fool the human eye: 3 and 8, 6 and 9, 0 and 8, 1 and 7, 2 and 5. It starts easy with two digits in a twelve-tile grid, then grows to thirty-five tiles and five-digit numbers.

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