Have you ever wondered, “How did this guy get elected?”

You’d think that becoming the President of the United States would require a lot of brain power, but that’s not necessarily true — at least, not all the time.

A researcher from the University of California at Davis came up with presidential IQ scores using biographical information about each POTUS’ openness, "intellectual brilliance" and leadership.

Meanwhile, C-SPAN anonymously surveyed 142 historians to rank every president from best to worst — the higher the score, the better the president.

For reference, an average IQ is around 100. Take a look to see if higher IQs correlate with great achievements or some not-so-smart decisions.

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