What occurs twice in a week, once in a year but never in a day?

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 think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Which number should replace the question mark?

Rearrange the letters in "new door" to make one word.

Why did Navjot Singh Sidhu put the new January calendar in the freezer

What has 88 keys?

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?

Can you Find and name the hidden bird in the picture below ?

Can you find the missing piece of the Porsche?