What is the standard deviation of a data set with values {4, 9, 16, 25, 36}?
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Math question: What is the value of f(x) for the constant function f(x)=c, if c=5?
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Math Question: What is the smallest positive integer value of n that satisfies the equation x^n + y^n = z^n, where x, y, and z are positive integers, according to Fermat's Last Theorem?