I’m tall when I’m young, and I’m short when I’m old. What am I?

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

You can see it everyday, But cannot touch it at will. What is it?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

Which flower has two lips?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

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?

Count the number of balls in picture below: