DAY 40

Comment

You will find that Grant's crates are smaller than the usual milk crates, but then he's only got a bicycle ... .

Answer

A crate holds 8 bottles.

Readers' methods

Gwen Best, South Island, New Zealand:
5 full crates and 11 bottles is the same as 6 full crates and 3 bottles.
So 11 bottles is the same as 1 crate and 3 bottles.
This works if a crate holds 8 bottles.

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