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?

What makes this number unique: 8,549,176,320?

One night, a woman receives a call from the police. They tell her that her husband was murdered and that she should come to the crime scene as soon as possible. The woman drops the phone, shocked, and drives 20 minutes to the crime scene. As soon as she reaches the crime scene, the police arrest her and she is convicted of murder. How do the police know she committed the crime?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

How many triangles are there in the picture below?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

During which month do people sleep the least?

Can you find the key in the picture below?

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

You can hear me, but you can't touch or see me.

What am I?