Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.

Do you know who was buried in John's tomb?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

In a school, 280 students studied chemistry, 254 students studied physics and 280 students studied biology.

97 students studied chemistry as well as physics, 138 students studied physics as well as biology and 152 students studied chemistry as well as biology.

73 students studied all the three branches.

Can you find out the total number of students?

What do you answer even though it never asks you questions?

Why did Buffon take the goal with him after every Juventus match?

What has many keys but can’t open a single lock?