BBD-MN3010 and MN3011- is a MN3101 clock necessary?

[Dan Gendreau]

XOR works for any number of inputs, just like AND and OR. IE. You can build
a 3 input AND gate by simply canscading 2 2-input AND gates, same thing with
OR and XOR.

It works like a this:
X = A XOR B XOR C

A B C  X
0 0 0  0
0 0 1  1
0 1 0  1
0 1 1  0
1 0 0  1
1 0 1  0
1 1 0  0
1 1 1  1

-Dan G.