Earlier quoted context omitted.
So, as someone who spends maybe 20% of their time hiring, it's still a very effective screen. You wouldn't believe how many people can't do it. People at big companies, respected places. It's surprising.
Wow, that's depressing. I used a different screen (having people make change based on an arbitrary amount, so if the input was 81, you'd return [25, 25, 25, 5, 1], as we were in the USA) and it was also helpful. I didn't track the number of people that it stymied though.
That sounds like a really fun one, and isn't dependent on people knowing about the modulus operator (which is rarely used)