What goes up but never comes down?

Can you find out the number that should replace the question mark with a valid reason?

How many triangles can you find in this given picture?

The below mentioned letters have been placed in a order using a logic.

DEAD, BALL, FEAR, SHOP

Can you find the logic?

Solve the counting riddle by identifying the number of triangles in the given picture.

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?