What is common among 11, 69, and 88?

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"

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Why 1729 is a magic number? Answer Logically.

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

A man was gazing through the window of the 23rd floor of the building. He suddenly opened the window and jumped on the other side of the window. On landing on the floor, there was not a sheer mark of injury on him.

How can that be possible if he did not use any kind of parachute and did not land on a soft surface?

What does this say?

XLR8

Before Mount Everest was discovered, what was the highest mountain in the world?