Deep Thought

A platform for seeking the answers to the meaning of Life, the Universe, and Everything.

Welcome to Deep Thought! At ideas42, our work involves tackling some of our world’s toughest problems. Naturally, when we need a little downtime, we unwind by solving some of the internet’s toughest puzzles.

In the spirit of a few of our core values—generosity, playfulness, and perhaps even tenacity—we’re excited to share puzzles so that you too can get one step closer to correctly answering the ultimate questions (hint: it won’t always be 42), while also (hopefully) having a bit of fun.


You’re standing between the door to candy land and the door to no-candy land. A guard stands by each door. One guard always tells the truth, and the other always lies (and the guards know this about each other). You don’t know which guard is which. What one question can you ask a guard to find out which door leads to candy land?


Think you have the answer? Submit your answer here.


To submit your own Deep Thought weekly puzzle, contact us at


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