# Patterns

Pro Problems > Math > Number and Quantity > Number Theory > Patterns# Featured Pro Problems

Given a sequence of compass directions, state the next two directions in the sequence, and explain your reasoning

Find the pattern relating each number to the one following it

What letters come next in the sequence shown below? Explain your answer.

Find the 200th triangular number, based on the given definition

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Directionally Challenged, Find the Pattern, Letter Sequence, Predict Y, Triangular Numbers# Understanding Coronavirus Spread

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

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