What brings you down but never up?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Why do you find that most of the buildings are deprived of the 13th floor?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?

The centre of the third figure is empty. What digit should fit inside?

Client Dempsey living in one of the East Coast states of the U.S. was talking to Landon Donovan, who was living in the West Coast state of the U.S.

Dempsey: What time is it?
Donovan: Wow, It is the same time here.

How is this possible?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

If 1+9+8=1, what is 2+8+9?

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?