How many words can a pen with half refill write?

On the dull night when the blonde was dozing, she heard an odd clamour and she saw that there was a bizarre man with a gun simply outside her home. So she raced to the telephone to call the police, however, she can't dial 911. Why?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

If a wheel has 54 spokes, how many spaces are there between the spokes?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

Before Mount Everest was discovered, what was the highest mountain in the world?

Our product and our sum always give the same answer. Who are we?

Find the hidden panda in the image below.