Hello @luisabsg ,
You will need to both define the second dropdown's default value and to reset it each time the user select a value in the first dropdown.
First, define your dropdown's default value with the code below:
Mod(Dropdown.Selected.Value + 10;60)
This code will automatically calculate the n + 10 number. If your user selected "10", it will return "20". If he selected "50", it will return "0" and so on.
Then, in the "OnChange" of your first dropdown, add the code below:
Reset(Dropdown2)
Be sure to replace "Dropdown2" with the name of your second dropdown.
This will reset the dropdown, which means it will try and automatically select the default value if possible.
Now when your user select "10", it will reset the second dropdown and make it select "20". And so on.
Hope this was helpful to you.
