FizzBuzz, precisely
Return a newline-separated string for 1..n: Fizz, Buzz, FizzBuzz, or the number.
Fibonacci(n)
Return the nth Fibonacci number efficiently.
Prime checker
Return True if n is a prime number.
Clamp a Number to a Range
Implement a clamp function that returns a value within a specified range.
Min of three numbers
Write a function that returns the minimum of three integers.
Sum numbers from 1 to n
Implement a function that computes the sum of all integers from 1 to n.
Sign of a Number
Write a function that returns the sign of a number as a string.
Is a multiple of both
Write a function that returns True if a number is divisible by both of two given divisors.
Digit count of an integer
Given an integer, return the number of digits it has, handling negatives and zero correctly.
Max of a variable-length list
Implement a function that returns the maximum value from a list of numbers without using max().
Between inclusive
Write a function that returns True if a number is between two given bounds, inclusive of the bounds.
Replace negatives with zero
Implement a function that replaces all negative numbers in a list with zero.
Absolute Difference
Implement a function that returns the absolute difference between two numbers.
Max of three numbers
Implement a function that returns the maximum of three numbers using comparisons.
Sign of a number
Write a function sign_of_number that returns -1 for negatives, 0 for zero, and 1 for positives.
Countdown printer
Implement a function that prints a countdown from a given number down to 1, then returns 'Go!'.
Average of a list
Write a function that computes the average of a list of numbers, handling empty lists by returning 0.
Count Positives
Count the positive numbers in a list of integers.
Range of values
Calculate the range (max minus min) of a list of numbers. Empty list returns 0.
Area of Rectangle
Write a function that returns the area of a rectangle given its width and height.
Digit Count
Count the number of digits in an integer using arithmetic, without string conversion.
Find Missing Number
Given a list of n distinct integers from 0..n with one missing, return the missing number.
Variadic Sum Function
Implement a variadic function that sums an arbitrary number of numeric arguments.
Palindromic Number Check
Write a function to check if a given integer is a palindrome.
Showing 1–24 of 184 challenges
Guide: free Python coding challenges
Practice Python by solving problems
PythonSkillset challenges are hands-on coding exercises from beginner to advanced. Open a challenge, read the problem, write Python in the split-pane editor, and run tests with Pyodide — no install required.
How to use the arena
- Pick a category — basics, algorithms, strings, and more
- Open a challenge, read the statement, and edit the starter code
- Run tests, fix failures, then try a related quiz or tutorial lesson
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.