How many triangles are there on the puzzle below?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

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

No one wants to have it, but if one got it, he does not want to lose it. What is It?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

What number comes next in this sequence:
7 8 5 5 3 4 4 _

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

Count the squares in the matchstick puzzle below?