Methodology

A top-10 list is only as good as the question "according to whom?". Every Daily Tens puzzle answers that before you play, not after.

What every puzzle records

• Metric — exactly what is being ranked (worldwide gross, not domestic; urban agglomeration, not city limits).
• Data date — the cut-off the ranking reflects.
• Source — a named, linkable publisher.
• Notes — the caveats: re-releases, tie-breaks, disputed measurements.

The metric and notes are visible during play, from the ⓘ under the question. The source link appears once the game is over, so it can't be used as a shortcut.

Accepted answers

Each answer carries a list of accepted spellings — abbreviations, former names, nicknames — and guesses are matched after stripping accents, punctuation and a leading article, with a small edit-distance allowance for typos. If you knew the answer, you should get the point. Missing an accepted spelling is a bug: report it.

Difficulty

A good top-10 is a slope, not a cliff: a few answers almost everyone gets, a middle that needs thought, and one or two that are genuinely hard. Puzzles that are uniformly easy or uniformly obscure get rewritten.

Category balance

Categories are rotated to keep any one subject — or any one country's sports — from taking over. There is deliberately no fixed weekday theme; the mix is balanced across a rolling window instead.

Repeats

Every puzzle is fingerprinted by its answer set before publication, so the same list can't run twice under a reworded question. A ranking whose underlying data has genuinely changed may return later — with a new data date, and labelled as such.

Ranking explanations and charts

Selected answer pages go beyond the ten names to explain the measurement, eligibility rules, comparisons and limits of the underlying data. Charts use numerical observations from checked source snapshots, with their units and dates shown. Release years and other context columns are labelled separately from the actual sorting metric. Where the original source does not support the question’s scope, the explanation states that limitation.

Interactive replay pages remain available for play. Search listings focus on answer pages with complete explanations; pages awaiting a historical-source check remain accessible in the archive. This separates a playable saved question from a claim that its ranking has been fully reconciled with the cited data.

Corrections

Later data editions do not silently overwrite a historical snapshot. When an actual error is confirmed, the affected entry is reviewed and any answer change is recorded on the corrections page. Reports about a wrong answer, a missing accepted spelling or a bad ranking are the fastest way to get that started.