I have branches, but no fruit, trunk or leaves. What am I?

What building has the most stories?

John is selling fruits.
He sells grapes at $30, Dates $25, and a Wolfberry $45.
At what price does he sell fig?

PS: Logical Thinking

Why Aeroplane windows are round?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Look at me. I can bring a smile to your face, A tear to your eye, Or even a thought to your mind. But, I can't be seen. What am I?

Find the missing letter in the last circle logically in the given below picture.

With the help clues provided in the image, can you find the 5 digit key?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?