I came up with this riddle today:
My Whole is of 2 terms.
My Prefix is 3 Letters.Term 1 is half open.
But Term 2 is mostly locked.My Prefix is an ex.
My Suffix is a passage.My infix is a symbol,
Mostly known as 3210.
Feedback is appreciated.
Looks like it is difficult, so here is a hint:
There is lots of logic in here, isn't it?