| Clue | Source | Date |
|---|---|---|
| Greek letters that symbolize summation | Universal | 15 Aug 2025 |
| Letters after rhos | Thomas Joseph | 10 Oct 2023 |
| Roughly E-shaped Greek letters | USA Today | 15 Jul 2023 |
| Ends of Sisyphus? | Wall Street Journal | 01 Jul 2023 |
| Sorority letters | Newsday | 30 Apr 2023 |
| Summation symbols | Universal | 06 Nov 2022 |
| 18th letters | Wall Street Journal | 05 Oct 2022 |
| Letters from Greece with a numeral value of 200 | ||
| Frat letters | Newsday | 27 Jan 2019 |
| Symbols in calculus | New York Times | 24 Jun 2018 |
| Greek letters | ||
| They follow rhos | Premier Sunday | 01 Apr 2018 |
| Greek letters | Premier Sunday | 04 Mar 2018 |
| Symbols in calculus | ||
| Greek letters after rhos | Premier Sunday | 24 Jul 2016 |
| Odysseus trio, to Homer | ||
| Odysseus trio, to Homer | ||
| Sorority letters | ||
| Summation signs | ||
| Sum symbols in math | ||
| Greek letters | ||
| Fraternity letters | ||
| Fraternity letters | ||
| E-shaped letters | ||
| E-shaped letters | ||
| Greek consonants | ||
| Sibilants for Socrates | ||
| Letters from Greece | ||
| Greek letters. |