[The_Reader_David]

Good grief, get it right.

Base 2 uses only the digits 0 and 1, it’s also called binary and used in computers. What we write as 2 is represented as 10.

(Hence the computer nerd shirt inscription: “There are 10 kinds of people, those who understand binary and those who don’t.”)

If you use base 3, you have the digits 0, 1 and 2, then 2 + 2 = 11, not 22.

[Elsie]

(Hence the computer nerd shirt inscription: “There are 10 kinds of people, those who understand binary and those who don’t.”)

Instead of...

(The Gummint skuul kid's T-shirt inscription: “There are 3 kinds of people, those who can add, and those who can't)