Sometimes a student is trying to enter an answer, and there is no chance to enter the whole number, or some elements are missing on the screen.
Please make sure that your browser scale is set to the default setting.
You can do this by pressing '⌘ and -' on Windows/Mac and 'Ctrl and -' (Control and minus) on Chromebooks. If you want to zoom in for some reason, use + instead of -.
Make sure you refresh the page after applying those changes!
If it doesn't work, feel free to contact us at firstname.lastname@example.org or on live chat on the website.