Using Only Five 5's and any mathematical operator make sum as 37

What can go through glass without breaking it?

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

Can you find a five letter word that is left with only two letters if one is removed?

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

Name a key which is hardest to turn.

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Which tank will fill first?

Jack was having a candle light dinner with his girlfriend. Suddenly a cold gush of wind entered through the open window and three of the ten candles were extinguished. Assuming that none of the other candles were extinguished.

How many candles are they left with in the end ?