Which Number?

Question

Should replace the ?

6 7 4 3 7

2 5 4 9 1

7 6 5 2 8

4 3 6 7 3

5 8 3 4 ?

Answer 1

8

Answer 2

6

i'm actually kinda guessing lol

in all 4 patterns above, the last two numbers add up to 10

so maybe ? = 6

Answer 3

nice, these are good

Six, because every 2x2 "box" adds up to 20

top right, top left, bottom right, bottom left, every 2x2 box adds up to 20

for the numbers people. nice. this reminds me of "grey matters blog" where scott does the 15 number puzzle square