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You have 45 domino pieces with all possible combinations of the numbers 0-8.

The goal is to make a «train» as long as possible in such a way that the product of the two numbers that are put together is an even number greater than 5 and less than 39. The number in the ends is not used in any multiplication.

Example

11 x 9 = 99 6 x 9 = 54

(This exapmle use wrong pieces)

(C) NMCC

Redaktør Svein H. Torkildsen