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

If eleven plus two equals one, what does nine plus five equal?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

Count the number of triangles in the below picture?

What word is represented by this rebus?

Which part of London exists in France as well ?

What do you see in the image below

What's the best place to go shopping in the ocean?

What does this rebus riddle means ?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?