I shave every day, but my beard stays the same. What am I?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

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

How many triangles can you find in this given picture?

In the image below, can you find the value of an angle(y)

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

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