1990 AIME Problems/Problem 1
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Problem
The increasing sequence consists of all positive integers that are neither the square nor the cube of a positive integer. Find the 500th term of this sequence.
Solution
This problem needs a solution. If you have a solution for it, please help us out by adding it. Because there aren't that many perfect squares or cubes, let's look for the smallest perfect square greater than . This happens to be . Notice that there are squares and cubes less than or equal to , but and are both squares and cubes. Thus, there are numbers in our sequence less than . Magically, we want the term, so our answer is the smallest non-square and non-cube less than , which is . (courtesy of 4everwise)