| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| Nikolai Ivanovich Lobachevsky is the name of a founder of non-this geometry | non-Euclidean | $800 | DJ | MATH CHAMPS | 2021-05-28 | #8410 | |
| It's any system of geometry not based on the system in "Elements", a book from around 300 B.C. | non-Euclidean | $1,600 | DJ | MATH | 2008-06-09 | #5481 | |
| It's any system of geometry not based on the system in "Elements", a book from around 300 B.C. | non-Euclidean | $500 | J | MATH CLASS | 1998-12-10 | #3284 |