Can you solve it? Are zombies going to eat your brain - video
by Alex Bellos, Ian Anderson, Tash Reith-Banks and Pa from on (#RM5M)
This week's Halloween brain-eater, sorry, brainteaser, was devised by an expert in the spread of diseases such as Ebola. The world is overrun with zombies, and the first has just arrived in the UK. Will the zombie outbreak die out, or are we all in mortal peril? Can you solve it?
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