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

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

There is a jar in which there are two types of candies.
20 blueberries and 16 strawberries. You perform the following steps:
1) You take out two candies.
2) If the two candies are of the same flavour, you add a blueberry one otherwise, you add the strawberry one.

You repeat these two steps till there is just one candy remaining in the jar. Which flavoured candy will be left?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

A bomb exploded in a room full of married couples and no one died. How?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Which number should replace the question mark?

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 ?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?