Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

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?

When can we add 2 to 11 and get 1 as the correct answer?

In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?

What number should come in place of the question mark below?

What Time Should the last watch show in the below figure?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?