Math question: What is the basis of vectors in three-dimensional space?
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Math question: What is the smallest positive integer value of n, satisfying the equation a^n + b^n = c^n, for a, b, c, and n being positive integers, in accordance with Fermat's theorem? (
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What is the average age of a group of 20 people if 5 are 30 years old, 10 are 25 years old, 3 are 20 years old, and 2 are 35 years old?