NEW CHALLENGE--FOR 9TH AND 10TH GRADE CADETS

Congratulations to Cadet Madden who correctly answered "one."  Good job! Can you figure out why one is the correct answer?

Here is a new challenge for 9th and 10 grade cadets only:

You have three containers. One has only red marbles, one has only blue marbles and the third has an equal number of red and blue marbles. The labels on the containers have intentionally been switched so that each container is now marked incorrectly.

Your job is to re-label the containers correctly. Of course you could just look in the containers to find out which labels match, but can you do it without looking into each container? Reach into any one of the containers and select one marble. Can you now correctly label all three containers? If not, select a second marble from any container.

Your question:  What is the fewest number of marbles you need to inspect in order to correctly label each container? 

This challenge will end at 0730, Monday 21 October.  Be prepared to explain your answer.  There will be a prize.  Good luck.