Problem: if n is a prime number greater than 5 , what is the remainder when n ^ 2 is divided by 12 ?
Rationale: there are several algebraic ways to solve this question , but the easiest way is as follows : since we can not have two correct answers just pick a prime greater than 5 , square it and see what would be the remainder upon division of it by 12 . n = 7 - - > n ^ 2 = 49 - - > remainder upon division 49 by 12 is 1 . answer : b .
annotated_formula: subtract(power(add(5, const_2), 2), multiply(12, const_4))