# Pro Problems

# Featured Pro Problems

A velociraptor falls from a cliff while a mosasaurus launches out of the water. Mayhem ensues.

Complex numbers, sequences and series, trigonometry, coordinate geometry, and conics all come into play in this hodge-podge problem

Find the sum of x and y, if the following quadratic equations in x and y are true.

Calculate the sum of squares, given the arithmetic, geometric and harmonic means of three numbers

Three digits get together for brunch and discuss their relationships

Without a calculator find a nine digit number that meets the criteria of the problem

A math problem involving Shrek wanting Fiona's telephone number

Solve the problem involving Luke Skywalker, Yoda, and an x-wing figher on Dagobah

# Understanding Coronavirus Spread

A Question and Answer session with Professor Puzzler about the math behind infection spread.

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