What goes up but never comes down?

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 ?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

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?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

I have branches, but no fruit, trunk or leaves. What am I?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

How many times can you subtract the number two from the number fifty?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Using Only Five 5's and any mathematical operator make sum as 37