False Five
Monday, August 31, 2026
Four questions. Five answers. Which one doesn't belong?
The five answers
- Coal
- Diamond
- Graphite
- Quartz
- Talc
The questions
- Which form of carbon is commonly used in pencils?
- Which mineral is so soft that it can be scratched with a fingernail?
- Which mineral is commonly used in watches because it can produce a steady electrical signal?
- Which mineral ranks 10 on the Mohs hardness scale?
Reveal the answers
- Graphite
- Talc
- Quartz
- Diamond
The False Five: Coal
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