To turn off question numbers go to Style > Text > Text Options and uncheck the option to Show Question Numbers. This will turn off question numbers in your live survey link.
Note: The Build tab will always show question numbers regardless of whether question numbering is turned off in the Style tab. To double-check your number is turned off, take a quick peek at Preview, Style, or the live survey link!
Check out other options in our Question Numbering Customizations Tutorial!