When can we add 2 to 11 and get 1 as the correct answer?

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

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?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

A spy was in Canada trying to steal insider information on how to set up new Maple Syrup factories in their country. He was introduced to the operations manager of the biggest factory in Canada. However, the manager was suspicious and decided to test him with a question before he trusted him. So he asked, “What would you be sure to find in the middle of Toronto?” The spy thought fast and came up with an answer for the manager. What was his answer?

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

Which is the smallest number that you can write using all the vowels exactly once?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?