What is the word or phrase?

Find the next number in the sequence

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

The answer I give is yes, but what I mean is no. What was the question?

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

What is black when you buy it, red when you use it, and gray when you throw it away?

Why did Buffon take the goal with him after every Juventus match?

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

Count the Triangle in the figure given below:

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?