One hides two, two hides five, Three hides four, it's no lie. We sound like Eden, when doubled up; More than two, then use a cup. If by chance you seek, then throw, The serpent sees when we meet low. Advantage gained, when we meet high, But separate us and we die.

Rhyme, count, Five, six, seven, Words you found, Add up to

It isn't a fable, mercuries neighbor makes life able, But I am next to him on a different table.

A tool of math with a royal name Of wood, steel or plastic frame Tiny ticks count up or down Governs space, it earns a crown

The more you take, the more you leave behind. What am I?