I look at you, you look at me, I raise my right, you raise your left. What am I?

What is the next number in the series?

15 29 56 108 208 ?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

The Little ant seems to be always confused. Do you know why?

This was asked in an interview with Coa-Cola.

The interviewer has given me 100 marbles(50 white and 50 black) and two empty boxes.
He then told me that he will leave the room and i need to place all the marbles in two boxes.

And When he come back, he will draw a marble from any of the two box and if the marble is white I will be hired.

Also
* No box can be empty.
* All 100 marbles must be placed in one of the two boxes.

So what should I have done?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

What goes through cities and fields, but never moves?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

Eight of us go fourth, not back, to protect our king from an attack. What are we?

What is the word or phrase?