Do You Have a Problem Squared?

This week's problem is from Sophie via a long complicated podcast route. Does dangling a spoon in the top of open champagne really keep it fizzy? And if so, why? Well, first of all, I'll explain where this problem comes from. Normally they come from our problem posing page at problemsquare.com. But we're taking overflow problems. How many podcasts are in the problem solving space? Surprisingly quite a lot. They do, don't they? Down at the Y.