There is a box which have 33 yellow marbles and 35 green marbles. You also have 34 green marbles outside the box.

Randomly remove two marbles from the box.
* If they are of different colors, put the yellow one back in the box.
* If they are the same color, take them out and put a green marble back in the box.

Repeat this until only one marble remains in the box.

What is the color of the sole marble left in the box ?

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slow_at_mathsAptitude
There is a box which have 33 yellow marbles and 35 green marbles. You also have 34 green marbles outside the box. Randomly remove two marbles from the box. * If they are of different colors, put the yellow one back in the box. * If they are the same color, take...