A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

When does a USA Potato change its nationality?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

There is an ancient kingdom where every married woman keeps information regarding the fidelity of other men. However, what they don't know is the fidelity of their own husbands. Also, there is an ancient belief that they don't tell each other about the fidelity of their husbands.

On a certain day, the queen of the kingdom declares that she has identified at least one unfaithful man in the kingdom. She allows the wives to identify and gives them authority to kill their husbands if they are unfaithful at midnight.

How will the wives manage it?

What is black when you buy it, red when you use it, and gray when you throw it away?

We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

Can you count the number of triangles in the picture below?

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

What has lots of eyes, but can’t see?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?