Is there a certain level of intelligence required to get into heaven? I would expect someone to be able to understand at least some of scripture to be saved, but how much intelligence is needed to understand what you need to be saved?
No intelligence is required.
The Bible assures us that even a fool won't go astray on the Way.
What is this Way, then?
So even a fool following Jesus will be saved.
Jesus also states that the kingdom of God belongs to those such as children. Now, children can be intelligent at times, but certainly this doesn't sound like there's an intelligence requirement.