Prime detective

How it works

1. Choose the only prime number. A prime has exactly two positive divisors.
2. Choose one of the offered answers. Finish ten questions to see your score. The correct answer is shown after each choice.

Example & practical use

Choose the only prime number. A prime has exactly two positive divisors.

Limits and help

Runs on this device. No online multiplayer, prizes or money. Puzzles and memory games are not medical or ability assessments.

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Troubleshooting

Try the small example on this page first. If it works, check your input format and size limit. Save any needed input before reloading. You do not need to share a file or password to report an issue.

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