The average (arithmetic mean)Q of the four distinct positive integers p, q…

The average (arithmetic mean)Q of the four distinct positive integers p, q, s and t is x. If p and q are odd, and s and t are even, which of the following must be true? I. x is an integer II. (x−0.5) is an integer. III. 2x is an odd integer.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #13496