This is an actual interview question asked by Microsoft to screen for employment!! Let's ask our 3rd Graders and see if they can understand this LOGIC :) 
 
Please check out my YouTube Channel "Math Challenge" for the SOLUTION! SCAN that QR Code to take you right to the video!
 
I would be SUPER DELIGHTED AND HAPPILY EMBARRASSED LOL if you showed my video to your class explaining the solution! 

I would LOVE to know how the problem worked out for your kiddos :) 
Any requests for future problems is greatly appreciated!
THANK YOU SO MUCH!! 

E-mail: knishimori@bridgemath.com