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

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

How many letters are in the alphabet?

Find the smallest sentence with all the English alphabet.

What can you deduce from the following BrainBat?

CRY
LMKI

No one wants to have it, but if one got it, he does not want to lose it. What is It?

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?