Nth Triangular Number
Implement a function that returns the nth triangular number efficiently.
Euler Totient Function
Implement Euler's totient function φ(n) for positive integers.
Partition function
Write a function that returns the number of ways to write a positive integer as a sum of positive integers (order irrelevant).
Multiply without multiply
Write a function that multiplies two integers using only addition, subtraction, and bit shifts — no * operator.
Showing 4 challenges · easy · Math & Number Theory
Math & Number Theory — Python coding challenges
What you will find here
This page lists math & number theory challenges — real Python problems you solve in the browser IDE with instant test feedback. Each challenge includes a clear brief, starter code, and automated checks.
Challenges vs tutorials and quizzes
Challenges test what you can build under constraints. For guided teaching, use our Python tutorials. For quick checks, try quizzes or copy snippets from code samples.