Looking on the internet deeply has found these results:

to ask questions is the most popular phrase on the web.

to ask any questions 119,200,000 results on the web	to ask questions 181,800,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Feel free to ask any questions you like. I don't want to ask any questions. They're not about to ask any questions. Told to carry some things to a landing site and not to ask any questions. Brick was too busy to ask any questions. I've learned not to ask any questions. I need you not to ask any questions. I know I promised not to ask any questions, but I don't understand.	If your work went public, people would start to ask questions. Don't be afraid to ask questions. Perhaps whoever is in the Chair should have the discretion to add some extra time to allow colleagues to ask questions on these two important communications. You have no right to ask questions. As friends, we should be allowed to ask questions. The passengers are starting to ask questions. And we needed to ask questions. I'm entitled to ask questions.

to ask any questions

119,200,000 results on the web

to ask questions

181,800,000 results on the web

More popular!

If your work went public, people would start to ask questions.
Don't be afraid to ask questions.
Perhaps whoever is in the Chair should have the discretion to add some extra time to allow colleagues to ask questions on these two important communications.
You have no right to ask questions.
As friends, we should be allowed to ask questions.
The passengers are starting to ask questions.
And we needed to ask questions.
I'm entitled to ask questions.