I don't have much knowledge of coding. How can I create Google Form with CAPTCHA to avoid spamming. Any form of CAPTCHA will work.
You can create your own simple CAPTCHA by inserting a multiple choice question like this:
How much is three plus seven?
( ) Don't know ( ) 9 ( ) 10 ( ) 11
Use the "Go to page based on answer" option to jump back to the page where the CAPTCHA is, or to the next page in the event the humanoid filling the form gets it right. That should let you avoid most bots.
As posted on Google Product forum