I agree with what you say as-is, but the other side of it is that the company might not be making optimal hiring decisions by doing this discrimination. A 22 ye

I agree with what you say as-is, but the other side of it is that the company might not be making optimal hiring decisions by doing this discrimination. A 22 year-old can choose to spend a full weekend on an interview task and do a great job, but once hired that doesn't mean they will actually work more hours (though they might). If we assume that once hired both the 20yo and the 40yo will work 40 hour weeks (i'm in europe), then it wouldn't be optimal to compare their take-homes evenly if the 20yo had spent way more time on it. Anyway its complicated. Seems like on-site open-book 90 minute real-world problems would be a nice solution.