Math Puzzle Answer

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Dominoes - Answer

The 136 dominoes have a total of 2,040 dots. Eight of them each have fifteen dots (0-15, 1-14, 2-13…7-8).

The remaining dominoes can be paired so that each pair has 30 dots, for example (2-7 and 8-13).

Thus 136 (15) = 2,040.

Another solution:

The 136 dominoes contain 272 numbers. Each number appears 272/16 = 17 times. And the number of dots is 17 (0 + 1 + 2 … + 15) = 2,040.