Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

In the image given, you can find several triangles. Can you count them all?

What is the next number in this series?

4,12,84,3612....

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

What makes this number unique: 8,549,176,320?

What do you call a fish without an eye?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

There were two grandmothers and their two granddaughters.
There were two husbands and their two wives.
There were two fathers and their two daughters.
There were two mothers and their two sons.
There were two maidens and their two mothers.
There were two sisters and their two brothers.
Yet there are only six, who are buried here,
All are born legitimate and relationships clear.
How can this happen?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

The more it dries, the wetter it becomes. Can you tell what it is?