Python Coding
Challenges

Python Basics easy

Sum of digits

Return the sum of all decimal digits of a non-negative integer.

arithmetic loops

+8 pts 10m

Python Basics easy

Collatz steps

Count how many steps the Collatz sequence takes to reach 1 from n.

loops math

+10 pts 12m

Python Basics easy

Factorial (iterative)

Compute n! iteratively without recursion.

loops math

+8 pts 8m

Python Basics easy

Prime checker

Return True if n is a prime number.

math loops

+10 pts 10m

OOP & Classes easy

Stack class

Implement a Stack class with push, pop, peek, is_empty, and size.

OOP stack data-structures

+12 pts 15m