| #2529 | Unsolved Math Problems | Oct 15, 2021 |
| #2528 | Flag Map Sabotage | Oct 13, 2021 |
| #2527 | New Nobel Prizes | Oct 11, 2021 |
| #2526 | TSP vs TBSP | Oct 8, 2021 |
| #2525 | Air Travel Packing List | Oct 6, 2021 |
| #2524 | Comet Visitor | Oct 4, 2021 |
| #2523 | Endangered | Oct 1, 2021 |
| #2522 | Two-Factor Security Key | Sep 29, 2021 |
| #2521 | Toothpaste | Sep 27, 2021 |
| #2520 | Symbols | Sep 24, 2021 |
| #2519 | Sloped Border | Sep 22, 2021 |
| #2518 | Lumpers and Splitters | Sep 20, 2021 |
| #2517 | Rover Replies | Sep 17, 2021 |
| #2516 | Hubble Tension | Sep 15, 2021 |
| #2515 | Vaccine Research | Sep 13, 2021 |
| #2514 | Lab Equipment | Sep 10, 2021 |
| #2513 | Saturn Hexagon | Sep 8, 2021 |
| #2512 | Revelation | Sep 6, 2021 |
| #2511 | Recreate the Conditions | Sep 3, 2021 |
| #2510 | Modern Tools | Sep 1, 2021 |
| #2509 | Useful Geometry Formulas | Aug 30, 2021 |
| #2508 | Circumappendiceal Somectomy | Aug 27, 2021 |
| #2507 | USV-C | Aug 25, 2021 |
| #2506 | Projecting | Aug 23, 2021 |
| #2505 | News Story Reaction | Aug 20, 2021 |
| #2504 | Fissile Raspberry Isotopes | Aug 18, 2021 |
| #2503 | Memo Spike Connector | Aug 16, 2021 |
| #2502 | Every Data Table | Aug 13, 2021 |
| #2501 | Average Familiarity | Aug 11, 2021 |
| #2500 | Global Temperature Over My Lifetime | Aug 9, 2021 |
| #2499 | Abandonment Function | Aug 6, 2021 |
| #2498 | Forest Walk | Aug 4, 2021 |
| #2497 | Logic Gates | Aug 2, 2021 |
| #2496 | Mine Captcha | Jul 30, 2021 |
| #2495 | Universal Seat Belt | Jul 28, 2021 |
| #2494 | Flawed Data | Jul 26, 2021 |
| #2493 | Dual USB-C | Jul 23, 2021 |
| #2492 | Commonly Mispronounced Equations | Jul 21, 2021 |
| #2491 | Immune Factory | Jul 19, 2021 |
| #2490 | Pre-Pandemic Ketchup | Jul 16, 2021 |
| #2489 | Bad Map Projection: The Greenland Special | Jul 14, 2021 |
| #2488 | Board Game Argument: Legacy | Jul 12, 2021 |
| #2487 | Danger Mnemonic | Jul 9, 2021 |
| #2486 | Board Game Party Schedule | Jul 7, 2021 |
| #2485 | Nightmare Code | Jul 5, 2021 |
| #2484 | H-alpha | Jul 2, 2021 |
| #2483 | Linked List Interview Problem | Jun 30, 2021 |
| #2482 | Indoor Socializing | Jun 28, 2021 |
| #2481 | 1991 and 2021 | Jun 25, 2021 |
| #2480 | No, The Other One | Jun 23, 2021 |