When positive integer a is divided by 6, the remainder is 1

When positive integer a is divided by 6, the remainder is 1. Which of the following must be true? I. a is a prime number II. a is odd III. a is divisible by 7

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #43799