Cyan Magenta facts

While investigating facts about Cyan Magenta Yellow and Cyan Magenta Yellow Black, I found out little known, but curios details like:

The "K" (or black) in CMYK stands for "key" because in four-color printing, cyan, magenta and yellow printing plates are carefully keyed, or aligned, with the black key plate, or the plate that prints the detail of an image.

how to make red with cyan magenta and yellow?

Cyan and magenta make what color?

In my opinion, it is useful to put together a list of the most interesting details from trusted sources that I've come across answering what color does cyan and magenta make. Here are 1 of the best facts about Cyan Magenta Yellow Color Wheel and Cyan Magenta Yellow Black Test Page I managed to collect.

what does cyan and magenta make?