Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

I make two people out of one. What am I?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

What can go through glass without breaking it?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

What do you see here? Your task is to find three words hidden in the optical illusion

Find the next number in the sequence

5 12 24 36 ?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?