If a two-digit positive integer has its digits reversed, the resulting integer…

If a two-digit positive integer has its digits reversed, the resulting integer differs from the original by 54. By how much do the two digits differ?

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 #6715