About This Pattern
Master the Math pattern by practicing these problems organized by difficulty.Focus on the Key Signals - these are the indicators that tell you when to use this pattern.
Medium (2)
Reverse Integer
Reverse digits of a signed 32-bit integer.
Key Signals:
Extract digitsBuild reversedCheck overflow
Factorial Trailing Zeroes
Given an integer n, return the number of trailing zeroes in n!.
Key Signals:
Factorial propertiesCount factors of 5Mathematical insight