Find the next number in the sequence

5 12 24 36 ?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

What word is pronounced the same if you take away four of its five letters?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

It belongs to you, but other people use it more than you do. What is it?

Replace the question mark with the correct number.