This problem has been shared millions of times on Twitter/Facebook with the claim "99% fail" to solve it and that only a genius could find the correct answer. If 9 = 72, 8 = 56, 7 = 42, 6 = 30, 5 = 20, then 3 = ? In this video I explain what many people believe to be the correct answer. I also show how this answer is logical for other patterns seen in the puzzle.
My blog post on this video (with links to sources)
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