If an integer x is to be selected at random from 1…

If an integer x is to be selected at random from 1 to 100, inclusive, what is probability x(x+1) will be divisible by 2?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #27877