Replace the question mark with the correct number.

Can you place six X (crosses) in below board without making three in a row in any way ?

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?

How many triangles are there in the picture below?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

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

Can you tell a 3D object that has just two surfaces?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Can it be possible to build a house that has all its four walls facing towards the South?