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Solve the missing number

Great, you answered "64".

See here what other people have answered:

  • 64
  • 22
  • 55
  • 35
23%
25%
25%
26%
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Interesting fact:

Language and communication are VITAL to human development. In fact, the neocortex of the brain, which is responsible for language, makes up 76% of its area. That means that humans have the largest neocortex of any animal.

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