About Zoggle

Zoggle is a small, free daily game about a big skill: numerical intuition. Three questions a day, each with a real numerical answer you almost certainly don't know. You estimate, you commit, and the game tells you how many times off you were.

Most trivia rewards remembering facts. Estimation rewards something rarer — reasoning your way from things you do know to things you don't. It's the skill behind good engineering guesses, sanity-checking headlines, and calling nonsense when a number in a meeting smells wrong. Physicists call these Fermi problems, after Enrico Fermi, who once estimated the yield of the first atomic bomb by dropping scraps of paper as the blast wave passed. He was within a factor of two.

Every question on Zoggle is written and researched for this site, with a worked estimate on the reveal so you can compare your reasoning — not just your number — against one sensible path to the answer. The answers come from public sources (government statistics, peer-reviewed research, industry bodies), and each reveal names its source. When authorities disagree, we pick the most-cited figure; the game scores by orders of magnitude, so a few percent of disagreement never matters.

Zoggle is an independent project — no company behind it, no account required, and your play history never leaves your browser. If it made you think, share today's score with someone who thinks they're smarter than you. That's the entire growth strategy.

Questions, corrections, or an idea for a great puzzle? Get in touch — question suggestions are very welcome, and get credited when used.