It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

How many words can a pen with half refill write?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

Find the value of "?" in the ball picture Riddle below:

How can you write nineteen in a manner that if we take out one, it becomes twenty?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

why number 8549176320 is one of a kind?

It is always ahead of me yet I can never see it. What is it?

Can you find the key in the picture below?