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  1. 101 Brain Teasers for Adults (with Answers) - Parade

  2. 58 Brain Teasers & Answers: Mind Puzzles To Stump You - Reader's Digest

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

  4. Brain Teasers & Puzzles for Adults with Answers - LogicLike

  5. Braingle » Brain Teasers, Puzzles, Riddles, Trivia and Games

  6. 101 Riddles for Adults That Will Test Your Smarts

  7. The Ultimate Collection of Brain Teasers To Keep You

  8. 20 Hard Riddles for Adults: Best Brain Teasers for Adults

  9. Printable Brain Teasers You Can Print for Free - Reader's Digest

  10. Brain Teaser Puzzles for Students & Adults - SmartBrainPuzzles

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