| 100 | The 3n + 1 problem | ★ | | |
| 118 | Mutant Flatworld Explorers | ★ | | |
| 272 | TeX Quotes | ★ | | |
| 299 | Train Swapping | ★ | | |
| 490 | Rotating Sentences | ★ | | |
| 948 | Fibonaccimal Base | ★ | | |
| 10008 | What's Cryptanalysis? | ★ | | |
| 10019 | Funny Encryption Method | ★ | | |
| 10035 | Primary Arithmetic | ★ | | |
| 10038 | Jolly Jumpers | ★ | | |
| 10041 | Vito's family | ★ | | |
| 10050 | Hartals | ★ | | |
| 10055 | Hashmat the Brave Warrior | ★ | | |
| 10056 | What is the Probability? | ★ | | |
| 10057 | A Mid-summer Night's Dream | ★ | | |
| 10062 | Tell me the frequencies! | ★ | | |
| 10071 | Back to High School Physics | ★ | | |
| 10093 | An Easy Problem! | ★ | | |
| 10101 | Bangla Numbers | ★ | | |
| 10170 | The Hotel with Infinite Rooms | ★ | | |
| 10189 | Minesweeper | ★ | | |
| 10190 | Divide, But Not Quite Conquer! | ★ | | |
| 10193 | All You Need Is Love! | ★ | | |
| 10221 | Satellites | ★ | | |
| 10222 | Decode the Mad man | ★ | | |
| 10226 | Hardwood Species | ★ | | |
| 10235 | Simply Emirp | ★ | | |
| 10242 | Fourth Point!! | ★ | | |
| 10252 | Common Permutation | ★ | | |
| 10268 | 498-bis | ★ | | |
| 10409 | Die Game | ★ | | |
| 10415 | Eb Alto Saxophone Player | ★ | | |
| 10420 | List of Conquests | ★ | | |
| 10642 | Can You Solve It | ★ | | |
| 10783 | Odd Sum | ★ | | |
| 10812 | Beat the Spread! | ★ | | |
| 10908 | Largest Squares | ★ | | |
| 10922 | 2 the 9s | ★ | | |
| 10929 | You Can Say 11 | ★ | | |
| 10931 | Parity | ★ | | |
| 11005 | Cheapest Base | ★ | | |
| 11063 | B2-sequence | ★ | | |
| 11150 | Cola | ★ | | |
| 11321 | Sort! Sort!! And Sort!!! | ★ | | |
| 11332 | Summing Digits | ★ | | |
| 11349 | Symmetric Matrix | ★ | | |
| 11417 | GCD | ★ | | |
| 11461 | Square Numbers | ★ | | |
| 12019 | Doom's Day Algorithm | ★ | | |