There are two "universal" gates
NAND. It is said that you can create all the logic gates with any combination of just these two. Logic.ly is a fantastic online tool that lets you play with binary logic gates.
See if you can use Logic.ly to create the
XOR functions using only
NOR or only
See if you can use Logic.ly to create any of the gates using a combination of only
More to come, this page is under construction...