Immortalized in the movie Rain Man, Dustin Hoffman's character performs mind-boggling feats of mathematical calculations yet cannot perform the simplest of tasks such as determining how much change he would receive when buying a candy bar. This is known as .

Savant syndrome

Explanation:

Savant Syndrome is a rare condition where a person with developmental disorders has incredible abilities or talent in a specific area, in the exercise given this area is the perform of mind-boggling feats of mathematical calculations.  

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they insisted that there was not enough time to learn everything.  

explanation:

if they were going to steal the answers that is simply because they insisted that there was not enough time to learn everything.  

after the moon goes from a full moon it turns into a waning gibbous moon.

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