A barge under construction is docked at a pier on Treasure Island on October 30, 2013 in San Francisco, California. Mystery barges with construction of shipping containers have appeared in San Francisco and Portland, Maine, prompting online rumors that the barges are affiliated with a Google project. - 

It's quiz time on Marketplace Tech. $27, 27602, 3 friends, 4 stories: Can you guess what these numbers mean?

We put Jonathan Strickland, host of the Tech Stuff podcast, to the test for our latest edition of Silicon Tally. Click on the audio player above to play along.

Follow Ben Johnson at @@TheBrockJohnson