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| 1. | | Chaos train quantifier logic problem (twitter.com/jdhamkins) | | 1 point by AllTalk on Dec 23, 2017 | past | |
| 2. | | Would one day of NYC coffee fill the Statue of Liberty? And other fun questions (hamkins.org) | | 1 point by AllTalk on Nov 10, 2016 | past | |
| 3. | | Pop culture written in logic – can you figure them out? (hamkins.org) | | 1 point by AllTalk on March 19, 2016 | past | |
| 4. | | Pop culture quotes written in first-order logic – can you figure them out? (hamkins.org) | | 3 points by AllTalk on March 17, 2016 | past | 1 comment | |
| 5. | | Math for kids: fold, punch and cut (hamkins.org) | | 3 points by AllTalk on Feb 23, 2016 | past | |
| 6. | | Math for nine-year-olds: fold, punch and cut for symmetry (hamkins.org) | | 1 point by AllTalk on Feb 22, 2016 | past | |
| 7. | | Infinite chess -– bishop cannon gun battery fires out bishop cannonballs (hamkins.org) | | 3 points by AllTalk on Oct 31, 2015 | past | 1 comment | |
| 8. | | Insane position in infinite chess -– bishop gun battery fires bishops out (hamkins.org) | | 2 points by AllTalk on Oct 29, 2015 | past | |
| 9. | | Transfinite epistemic logic puzzle challenge: Cheryl's birthday on steroids (hamkins.org) | | 2 points by AllTalk on April 19, 2015 | past | 3 comments | |
| 10. | | Math for eight-year-olds: graph theory for kids (hamkins.org) | | 350 points by AllTalk on April 10, 2015 | past | 45 comments | |
| 11. | | Math for eight-year-olds: graph theory and the Euler characteristic (hamkins.org) | | 3 points by AllTalk on April 9, 2015 | past | |
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