that is a tough one, there are a few objective measures of IQ or intelligence in general, which is the ability to learn and reason. Spacial reasoning skills (being able to predict how an object rotates for example, or pattern recognition) and recursive thinking are 'considered' high IQ moves. Mensa has quite a few of these types of questions, at least in the early 2000s, not sure about it now. Modern day American schools won't directly test intelligence, instead use standardized testing to separate the high IQ kids from the rest through extended learning programs. If you grew up in the 90s or 80s it may have been GATE or Gifted and Talented etc. Basically more rigorous the standardized test, the better the smarter kids do anyway because they actually can accumulate the basic knowledge and apply it.

So to answer your question, someone that can understand recursive thinking and spacial reasoning are the ones qualified to test for higher than average IQ, whereas if someone doesn't understand the beeping sound in their hallway...

Irrelevant.

I can measure any lenght without being that lenght. I can measure any temperature without being that temperature. I can use tools to do things my body is not capable of.

IQ is a measure of relative intelligence, not absolute intelligence. It measures ths difference between people, not the total possible intelligence, which is obviously not knowable.

Doesn't matter. They make a bunch of questions, test a bunch of people, then find which ones correlate with which IQ ranges.

Maybe you mean how to write the "master" IQ tests used to calibrate the others.

27

Ask chatGPT to write one, it scored 155 lol https://www.scientificamerican.com/article/i-gave-chatgpt-an-iq-test-heres-what-i-discovered/

Fairly high, but the more high IQ people involved, generally the higher their collective IQ is, up to a point.

I think of it as working backwards. Almost like reverse engineering.
You don’t need to be inspired. Just make up a problem and then find a way to trick you into thinking about it.

Probably 110 or so.

Great question. My guess is you just need a nose the size of an elephant.

If you can do high school algebra you're in.