Alphanumeric is a game of counting.
If given the question A + 3
...Just "count" the alphabet starting from "A", three letters more.
..
A, B (1), C (2) D (3)...
So D is the answer, because A + 3 = D
It gets harder.
Given F - 1, youd go backwards from F, one place, to E.
F - 1 = E
NOTE: If counting would take you past Z, or backwards before A, just wrap around.
So, Z + 2 = B
SCORING
Harder questions get more points.
If you miss one, youll be deducted points.
The faster you choose the correct letter, the more points youll earn!