A 45–60 minute Criterion B investigation for MYP Mathematics students covering sequences, exponential patterns, and generalising rules. Students simulate the Tower of Hanoi puzzle, record the minimum number of moves for increasing numbers of disks, identify the pattern, and derive the formula T(n) = 2ⁿ − 1. They then apply it to predict large values and verify edge cases. What's included: 6-page print-ready PDF (student activity + answer key) When to use it: As a Criterion B assessment task or g