What is both possible and impossible at the same time?

Can you name an animal whose killing cannot be performed without spilling your own blood?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Which is Odd One Out and why?

4377

3954

9862

8454

9831

Two friends were stuck in a cottage. They had nothing to do and thus they started playing cards. Suddenly the power went off and Friend 1 inverted the position of 15 cards in the normal deck of 52 cards and shuffled it. Now he asked Friend 2 to divide the cards into two piles (need not be equal) with equal number of cards facing up. The room was quite dark and Friend 2 could not see the cards. He thinks for a while and then divides the cards in two piles.

On checking, the count of cards facing up is same in both the piles. How could Friend 2 have done it ?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

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

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

Which is the correct shadow of the bird?