Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

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?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

Which is heavier: a ton of bricks or a ton of feathers?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

Chocolate costs 6 rupees and a Toy costs 5 rupees. If you have 32 rupees in total, how many chocolates and how many Toys can be purchased with that amount?

There is an exact a week gap between Christmas and New Year. Hence, It is obvious that the new year that comes right after Christmas comes on the same day of the week.

A Strange thing happened in the Year 1777. Christmas occurs on Wednesday and New Year on Monday. How is that possible?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?