Daily Mail on MSN
'Simple' math tests leaves people racking their brains - can you solve it in 30 seconds?
Get your timer out and see whether you can remember the golden rule from grade school math class.
A simple-looking math problem has confused people for years. Here's the answer and the reasoning behind it—that settles the debate. #MathChallenge #BrainTeaser #Puzzle #WaitForIt #MindBlown ...
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