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Nordic Math Class Competition

The winners in the national competitions in each of the Nordic countrys represent the nation in Nordic Math Class Competition.

The competiton consists of three parts:

1. Problem solving
2. Exhibition
3. Performance

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A problem from NMCC final 2022

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)

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(C) NMCC

Redaktør Svein H. Torkildsen