/sci/ - Science & Math

Waste of my time, considering my mediocre score. I was stumped by the MIXAYO question/"what letter goes in the last 2 cells". The letters obviously mean nothing at face value, but when turned into numbers I got a

XOXOX

XOOXX

pattern, X being a subtraction and O being additive, and since theres only one letter for the answer that means that the completing letter would represent an addition as in a higher letter in the alphabet. Analyzing a discrepancy sub-pattern between the additions and subtractions is circular and could lead down an endless puzzle.

13 9 24 1 25 15 / -4, +15, -23, +24, -10

4 3 15 24 11 9 / -1, +12, +9, -13, -2

What's the answer? I have no experience in math or this kind of stuff