Find the next number in the sequence

1, 2, 6, 21, 88, __?

Can you count the number of quadrilaterals in the picture below?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

A woman named Maria was at the funeral of her mother. She met a nice young man that she had never seen before and after the service, they spent a bit of time together. Then she got busy and didn’t get his name or phone number before he left. She tried to find him, but no one knew who he was or how to contact him. A few weeks later, Maria’s older sister dies and the police suspect murder. Who killed the sister?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

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?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?