I want to use merge codes in validation . That is if the answer of first question 1 is 4 , then question 2 will accept only values greater than 4. how to accomplish this validation .
I am not sure that you can do this with merge codes. It is possible with custom scripting if you have a PROFESSIONAL or ENTERPRISE level account.
There is an example of a script that does something similar in the documentation – https://script.surveygizmo.com/help/article/link/setting-max-total-value-dynamically.
The script uses the ‘sgapiGetValue’ function to get the answer from question 1 and then uses the ‘sgapiSetQuestionProperty’ function to set the validation value for question 2. The documentation includes an example that you can download to your account to review and modify.