[cruise02]

"...to a 5 year old" should be pretty safe. "...to your grandmother" could be construed as both sexist and ageist, so I'd avoid it.

[CaptSpify]

Personally, I don't really see much of a difference. Some 5 year olds are better at $x than "grandmothers". So wouldn't "to a 5 year old" be ageist as well?

[cruise02]

Use some common sense. For how many values of $x that would be the subject of an interview question are 5 year olds going to be better than grandmothers?

[CaptSpify]

Your missing the point though: There's a reason the "non-technical grandmother" is a stereotype. By using "common sense", it makes sense to use that stereotype.

[cruise02]

Please do advertise that since there's a reason for stereotypes, your company uses them in making hiring decisions. Let me know how that goes over.

[CaptSpify]

I really don't think I'm getting your point. It's OK go stereotype for one group, but not another?