First and second prize to Egren71 for having the first correct answer and making it simpler.
Third prize to Satsmo for the most concise method assuming it wasn't copied from Egren71.
Fourth prize to Barrowmanandrew for working it out then spotting the flaw.
The rest of you well, honestly.

Sunday, give the brain a rest.
Third prize to Satsmo for the most concise method assuming it wasn't copied from Egren71.

Fourth prize to Barrowmanandrew for working it out then spotting the flaw.
The rest of you well, honestly.

Sunday, give the brain a rest.


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