Math
Pro Problems > MathFeatured Pro Problems
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Complex numbers, sequences and series, trigonometry, coordinate geometry, and conics all come into play in this hodge-podge problem
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Find the sum of x and y, if the following quadratic equations in x and y are true.
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Calculate the sum of squares, given the arithmetic, geometric and harmonic means of three numbers
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Without a calculator find a nine digit number that meets the criteria of the problem
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The digits from zero to nine are competitors in a new reality TV show. Which digit will win?
![](/images/icons/directories/xsystems.png,qx=5.pagespeed.ic.yJI7cmV95p.png)
Two people go to the same store and make the same purchases, but one of them is treated unfairly in the pricing
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