Find the next number in the sequence

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

A mad serial killer kidnaps people and forces them to play the game of 2 pills with them, In this game, there are pills in the table and one of them is normal pill while the other one is deadly poisonous.
The victim will choose one pill and the killer will pick the other pill and both simultaneously will swallow the pill with water.
victim dies every time.

One day the serial killer kidnaps the Joseph and forces him to play the same game with him.

Joseph solves the mystery of the two pills and remains alive.

Explain?

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 ?

Which is the rope you never skip with?

What's a single-digit number with no value?

What seven-letter word has hundreds of letters in it?

What can you catch but never throw?

Which is the correct shadow of the bird?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?