# Lesson Logic problems - The solution to Problem 1

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This Lesson (Logic problems - The solution to Problem 1) was created by by ikleyn(4)  : View Source, Show

## The solution to Problem 1

Below (after the reminder) is the solution to the Problem 1 of the lesson Some logic problems (the topic Miscellaneous word problems
of the section Word problems in this site).
Problem 1 formulation (reminder)
Three boxes contain one ball each: white, black or green.
The first box is labeled as "White", the second box is labeled as "Black", and the third box is labeled as "White or Green",
but none of the labels correspond to the box content.
Can you identify, which ball is in which box?

Solution
First, consider the box labeled as "White or Green".
Since this label doesn't match the box content, this box contains the black ball.

Now, consider the box labeled as "White".
Since this label doesn't match the box content, this box can contain the black or the green ball.
But we just have found that the black ball is in the box labeled as "White or Green".
Hence, the box labeled as "White" can contain the green ball only.

At last, for the box labeled as "Black", the only one opportunity remains: this box contains the white ball.