Who can jump higher than a Mountain?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

Alex is stranded on an island covered in forest.
One day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process.

There are cliffs around the island, so he cannot jump off.

How can the Alex survive the fire? (There are no buckets or any other means to put out the fire)

A father's child, a mother's child, yet no one's son.

Who am I?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

A man desired to get into his work building, however he had forgotten his code.
However, he did recollect five pieces of information
* Fifth number + Third number = 14
* The fourth number is one more than the second number.
* The first number is one less than twice the second number.
* The second number and the third number equals 10.
* The sum of all five numbers is 30.

What is the code ?

What is the word or phrase?

Can you spot the man between the coffee bean in the picture below ?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?