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

While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.

How will he do it?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

What does below rebus means ?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

I have Rs.50 and I spend it in the way as below.

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?