Yes, the sentence "Some questions are tiring to answer" is grammatically correct.
The phrase means that certain questions can be exhausting or mentally draining to respond to, often because they may require a lot of thought, repetition, or emotional energy.
Here are a few ways to rephrase it:
1. "Answering certain questions can be exhausting."
2. "Some questions can be exhausting to respond to."
3. "There are questions that can be tiresome to