What is the value of a 1935 US silver certificate?

You didn't include the bill's denomination but the only silver certificates with that date were $1 bills. However, they were actually printed as late as 1964 (!) so you need to check what letter, if any, is next to the date.

Then please see the question "What is the value of a 1935 [letter] US 1 dollar silver certificate" for more-specific information.