| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| The only even prime number | 2 | $200 | DJ | SIMPLE SCIENCE | 2001-05-23 | #3863 | |
| You have many sweatglands, but only this number of lacrimal glands | 2 | $600 | DJ | SCIENCE | 1994-11-23 | #2353 | |
| Dragonflies have this many pairs of wings | 2 | $400 | DJ | SCIENCE | 1990-04-30 | #1316 | |
| A little harder than talc, but not as hard as calcite, gypsum is this number on the Mohs scale | 2 | $100 | J | SCIENCE | 1989-12-15 | #1220 | |
| Minimum number of lenses you need to make a simple refracting telescope | 2 | $200 | J | SCIENCE | 1988-12-19 | #991 |