What is next number in the pattern below:

131 517 192 123 ?

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

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

The more you take me, the more you leave me behind.
Who Am I?

I can be cracked, made, told, and played. What am I?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

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?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

Why do people go to bed?