Incongruent (adjective)
out of place, incompatible, inharmonious, not congruent
“The yellow blazer was incongruent for the funeral.”
“Her knowledge of world politics was incongruent in someone so young.”
Incongruent (adjective)
of or relating to two numbers that have different remainders when divided by a third number
Incongruous (adjective)
Not similar or congruent; not matching or fitting in.
Incongruous (adjective)
Of two numbers, with respect to a third, such that their difference can not be divided by it without a remainder.
“20 and 25 are incongruous with respect to 4.”
Wiktionary