I thought it was multiples of 4 as well???...which 2 would not be a multiple of 4...a bit confused as the instructions have 2 as a noggin, but the example does not...if going by multiples of 4 though, the example would be correct.
May 25, 2013 · Brain Games is a pop science series about the brain that uses perceptual experiments, cognitive hacks and optical illusions to create a crack in your perception of reality. "It's smart-ertainment ...