Can you find the odd number in the following?

2716, 4135, 5321 and 7145

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)

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

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

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

How many letters are in the alphabet?

How can you make a TV, a bed, a dog, and a car liquid?