Which number should replace the question mark?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

A charming young lady was approached by a kind looking old woman in a restaurant. The old woman said to her, 'You look exactly like my younger daughter. Sadly she passed away a couple of months back. Could you do me a favor and say 'Goodbye, mother' with a kind smile on your face when I leave?

The young lady agreed for the same and said, 'Goodbye, mother' when the old woman left. Soon after, she got the most disengaging shock of her life.

Can you guess what the shock was?

Can you count the number of triangles in the given figure?

What you cannot hold but it is yours?

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 out the total number of triangles in the given figure?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

What has one eye, but can’t see?

Can you divide the below-given shape into four equal and identical pieces?