Factors of 12

Synopsis
Mathman plays a video game in which he must eat only numbers that are factors of 12.

Mathman starts by eating 2. When he encounters 5, he shakes his head. Then he eats 6, but accidentally eats 24 and loses.

Correct

 * All correct numbers are factors of 12 - 1, 2, 3, 4, 6, and 12.

Incorrect

 * 5
 * 8
 * 21
 * 24

Quotes
Announcer: "And beware the fiendish Mr. Glitch. He will eat you if you are wrong."