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Google Labs Aptitude Test

Explore how to solve a Google Labs aptitude test puzzle by applying Ruby nested loops and uniqueness constraints. Understand brute-force methods and optimize with logic to solve cryptic equations representing letters as distinct digits.

In this section, we'll use our coding skills to solve some fun puzzles. You might've seen them before, but solving them with code will be more interesting.

Problem

Solve this cryptic equation. Every letter represents a distinct number between 0–9. No leading zeros are allowed. (This was a Google interview question).

WWWDOT
- GOOGLE
--------
DOTCOM

Purpose

  • Using nested loops ...