What work can one never finish?

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

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?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

Can you name some countries which do not have the alphabet 'A' in them?

What is the largest number you can write with just 3 digits?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?

Can you place six X (crosses) in below board without making three in a row in any way ?

Can you find the six hidden animals in the picture below?