What month of the year has 28 days?

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?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

What does Alexander the Great and Winnie the Pooh have in common?

What have one eye but still cannot see?

What can go up a chimney down, but can’t go down a chimney up?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.

What Deficiency does the below rebus represent?

VIT_MIN

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

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?