Math Trivia and Answers

Easy

What is a positive integer that is equal to the sum of its proper positive divisors (excluding the number itself) called?

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Answer: A perfect number.
More information: You might also think of a perfect number as a number that is half the sum of all of its positive divisors, including itself! This definition is at least 2300 years old as it appears in Euclid's "Elements".

Easy

Which mathematician has an Erdős number of zero (0)?

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Answer: Paul Erdős, of course!
More information: As the Erdős number describes the "collaborative distance" in authorship of mathematical papers between mathematician Paul Erdős and another person it is only natural that Paul Erdős holds this position.

Easy

What is the sum of the angles of a triangle?

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Answer: 180 degrees
More information: The angles of a triangle always sum to 180 degrees.

Hard

What Erdős number does Pierre-Simon Laplace have?

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Answer: Pierre-Simon Laplace has an Erdős number of at most 14!
More information: According to "The Erdös number project" a path to Laplace was found by Leonid Yanushevich giving the famous mathematician an Erdös number of at most 14.

Easy

How many obvious/trivial factors does a natural number N have?

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Answer: 4 trivial factors.
More information: The positive +1 and +N and the negative -1 and -N.

Medium

What is the median Erdős number of Fields Medalists?

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Answer: 3
More information: Of course, as time passes, the smallest Erdős number that can still be achieved will necessarily increase, as mathematicians with low Erdős numbers die and become unavailable for collaboration.



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