What’s the answer? i don’t understand

Having a hard time understanding this question (see attachment).

]supplementary angles are two angles that add up to . • complementary angles are two angles that add up to degrees. • adjacent angles share a and a • congruent angles have the measure. • an triangle has one angle that is greater than 90 degrees. • a triangle with angles 45°, 45°, and 90° would be a triangle

Prove that 16^4-2^13-4^5 is divisible by 11.