incongruous

adjective2

1. •
   Not similar or congruent; not matching or fitting in.

   • [P]erhaps he thought me, with my basket of summer fruit, and my lack of the dignity age confers, an incongruous figure in such a scene. — 1853
2. •
   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.