It is not illegal to use IQ tests as part of a job screening (in the US). It is illegal to screen in a way that is both discriminatory and not proven to correlate with job performance, but that applies equally to both IQ tests and algorithms questions.
Obviously I do not think that is false; you can get sued for literally anything. Do I think you would lose? Depends on whether you've done the research showing that 135 is an important cut-off.
To turn this around, can you point at the law that makes IQ a protected class or whatever you're claiming it is? I'm not going to have much luck proving a negative - Russell's teapot and all that.
