A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?

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?

Can you find the thief by just looking at the picture below?

Spot what is wrong here in below Picture?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

Find the next number in the sequence

5 12 24 36 ?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

What four weights can be used to balance from 1 to 30 pounds?

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