I’m tall when I’m young, and I’m short when I’m old. What am I?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

What's the only room from which no one can enter or leave

Which English verb becomes past tense just by rearranging the letters?

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?