Answer:
A congruence class modulo 12 refers to a set of integers that are equivalent to each other under the modulo 12 operation. In other words, if two integers have the same remainder when divided by 12, they are in the same congruence class modulo 12. For example, the congruence class of 5 modulo 12 includes all integers that leave a remainder of 5 when divided by 12, such as 5, 17, -7, 29, etc.
