What is half way between 1 and 9 ?

What’s halfway between 1 and 9? If you’re like most people, you’d answer 5 or 4.5 – which is fine. But if you take a 6 year old kid on the other hand and ask him the same question, the odds are he’ll answer 3.

Our Brains are wired to think NOT logically but logarithmatically.
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http://www.zmescience.com/science/math/brain-logarithm-not-linear-26102012/