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  1. 58 Brain Teasers & Answers: Mind Puzzles To Stump You - Reader's Digest

  2. 95 Hard Riddles (With Answers) That'll Leave You Totally Stumped

  3. 105 Challenging Riddles for Adults (With Answers) - Good Housekeeping

  4. 20 Seriously Hard Brain Teasers | POPSUGAR Smart Living

  5. 27 Hard Riddles to Test Your Smarts with Answers - Reader's Digest

  6. 101 Brain Teasers for Adults (with Answers) - Parade

  7. 40 Really Hard Riddles (With Answers) - Let's Roam

  8. 70+ Challenging Riddles for Adults (With Answers)

  9. 85 Hard Riddles To Test Your Wits - Bored Panda

  10. 84 Hard Riddles That Test Your Brain Power - Bustle

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