15 Tricky Riddles I Didn't Sleep a Night to Solve

How to increase your brainpower? In order to develop creative thinking, some psychologists advise solving different riddles and quizzes. Such exercises develop critical thinking and improve memory. When you don't train your brain, it gets rusty! Your mind stops being as sharp as before, and your reactions slow down. Scary? Then what are you waiting for? Here are riddles of varying complexity that will help you both train your brain and entertain yourself!
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