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For me it's 98.5, but it depends on the solving method. There can be more than one way of solving.

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Looking at this in the AM, drinking coffee, it reminded me of the daily puzzles that run in the newspapers, good to get the brain going in the morning

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3x2 + 1
5x4 + 3
7x6 + 5
9x8 + 7
10x9 + 9

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I looked at your solution and found another one that I think might be correct. It gives a result of 98.

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3x2 + 1
5x4 + 3
7x6 + 5
9x8 + 7
10x9 + 8 # Could well be.
11x10 + 9

TMTOWTDI

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