Which alphabet letter is a question?

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

Imagine you are in a room with no windows or doors. How will you get out?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Can you find the six hidden animals in the picture below?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

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.

What is wrong in the below Picture?