Are you ready for a new portion of riddles? Riddles, brain-teasers and all sorts of puzzles have such a long-lasting and immense effect on the power of our brains that solving them on a daily basis can actually turn out to be a great brain training. Not only do they improve our problem-solving skills but also boost the functionality of our brain. Here're 18 tricky riddles even an A student can't solve.

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