The remainder when the square of any prime number greater than 3 is divided by 6, is Any prime number greater than 3 is of the form `6k +- 1`, where k is a natural number. Thus, `( 6k +- 1)^2= 36k^2+-12k+1` `= 6k (6k+-2)+1` When, `6k(6k+-2)+1` is divided by 6, we get, `k(6k+-2)`and remainder as 1. Hence, the correct choice is (a). [Hint: Any prime number greater than 3 is of the from 6k ± 1, where k is a natural number and (6k ± 1)2 = 36k2 ± 12k + 1 = 6k(6k ± 2) + 1] Concept: Euclid’s Division Lemma Is there an error in this question or solution? Open in App Suggest Corrections 6 |