Vortex wrote:

You need to sum up all of the pistons in your household. Qualifying pistons
must exist in functional internal combustion engines. Vehicles, power tools
and garden machines are all valid.

Best I can manage is 16 (and that includes adding those in Mother's car
which is currently on our driveway, and the 10cc IC engine in my toy boat!)

--
Cheers,

John.

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