What does this rebus means ?

PROG WORKRESS

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

O_er_t_o_

Complete the missing letters of the given word.

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

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 ?