Microsoft just published a paper - modestly titled "AGIEval: A Human-Centric Benchmark for Evaluating Foundation Models" - that, no joke, uses readily available *online* sample SAT questions to evaluate the GPT class LLMs. The problem, of course, is that same data was likely used to train the same models. https://arxiv.org/pdf/2304.06364.pdf
There's a github link at https://github.com/microsoft/AGIEval/blob/main/data/v1/sat-en.jsonl that has the questions. I tried one and got a search hit.
The paper does state that they did this - ""With regard to data collection, we gather Gaokao and SAT questions from publicly available online
sources, along with their corresponding solutions or explanations".
No mention of all of how this is likely poisoned data.