Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

The more you take me, the more you leave me behind.
Who Am I?

It is always ahead of me yet I can never see it. What is it?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

What jumps when it walks and sits when it stands?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6