Why do you find that most of the buildings are deprived of the 13th floor?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

A man was telling some of his war stories to his grandchildren.
"When the World War I was on the verge of end, I was awarded for my bravery for I had saved a group of my men." He coughed and then added, "When we were fighting in northern France, an enemy soldier threw a grenade at us. Before it could explode, I picked it up and threw it away. For my act of bravery, right before the war ended, A General gave me a sword engraved with the words "Awarded for Display of Bravery and Heroism in World War 1"."

Hearing this, one of the grandson spoke up. "Grandpa, this is not a true story. It can"t be true!"

The truth is that it was not. How did the grand children know it?

What is the below Rebus indicate?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

The more you take me, the more you leave me behind.
Who Am I?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?