Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

Jack and Joseph are well-known golf rivals. One Day during a match, they were level at a score of 30. Jack hit a bad shot and Joseph added 10 to his score. Joseph then hit an awesome shot and he won the game.

How ?

Take away the whole and some still remain. What is it?

Can you tell a 3D object that has just two surfaces?

I am the first thing you need while camping.
I am always with the person named Marcos Valencia and Carrick.
But Pogba Zlatan and Rooney think I am wasteful and do not need me.
I am the second to the last thing to add when you are making a patch.

What am I?

What is the next number in the series?

15 29 56 108 208 ?

What is the riddle which can be asked all day with a different correct answer each time.