I was given one at around age 12 in school to see if I qualified for an accelerated program, and then another one around age 28 as part of a university research

I was given one at around age 12 in school to see if I qualified for an accelerated program, and then another one around age 28 as part of a university research study (on user interface related topics) I volunteered for. I'm not surprised if people are tested in grade school, but I suspect running into them outside of research after your school years is rare.