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Contact
Tell us about a mistake, ask for a correction, or talk to us about working together.
Updated 13 November 2026
Write to us at [email protected].
What to include
- A mistake in a question or answer: the address of the page, the question number and what you think is right.
- A correction or removal request: the address of the page and why the content should be changed or removed.
- Advertising, sponsorship or working together (institutes, academies, teachers): a short note about your organization and what you have in mind.