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Reminds me of The Riddler...

• frankbreetz 7y ago
  Haha, This was the closest I've ever felt to being Batman
• myself248 7y ago
  This is totally something that Monday and Frankly would've encountered on Mathnet.
• jammygit 7y ago
  If I'm ever a math teacher, this story will be an exam question ending in 'what was the man's pin?'