Contact
We welcome questions, suggestions and bug reports.
We try to reply as soon as we can. When you report a wrong question in an answer key, include the job number and, if possible, the page of the question so we can find the problem faster.
If you have an account
If you are logged in, you can use the “Report a problem” form on the Help page. The form sends us your job and topic together with your message.
Question credits, plans and payment
See the Plans page for plans and question credits. If there is a payment problem, just write to the address above.
Personal data
To download your data or delete your account, use My account → My data. You can write to the same address for corrections or any other request. Details are on the Privacy page.
Advertising and partnerships
If you would like to write about the site, advertising or content partnerships, you can reach us at the same address.