Thread:TheSURVIVR/@comment-38673718-20200122011401/@comment-31984232-20200124035638

9+10

say that is base 12 (in stead of digits being 0123456789 (base 10), they are 0123456789AB, where A = 10 and B = 11)

9 base 12 = 9 base 10 10 base 12 = 12 base 10

9+10 base 12 = 9+12 (base 10) = 21 (base 10)