This is the exact reason I set up my phone to go on ring mode at full blast whenever someone truly important calls me. I know they’d only call me whenever it’s important (because I’ve told them beforehand that this happens, so they text if it’s not important).
My friend recently introduced me to Mathler.
It’s a game where you have to guess a math formula that’s equal to a given number, by giving both the digits (0-9) and operations on those numbers (+ - * /). You can even pick a difficulty depending on how good your math skills are.