Name a key which is hardest to turn.

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

People make me, save me, change me, raise me. What am I?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Solve the equation in the image by looking at the pattern closely.

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?

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?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?