What is so fragile that saying its name breaks it?

Find the number of squares in the below-given picture.

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

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

John was drowned by he was not wet. How?

Sally lives in a place where six months of the year is mild summer and the temperature drops significantly the other six months. She owns a lake where there is a small island. She wants to build a house on the island and needs to get materials there. She doesn’t have a boat, plane, or anything to transport them to the island. How does Sally solve this problem?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

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

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

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