Name a member of the European Union.
Membership as of September 2026. Country names and common aliases count.
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Membership as of September 2026. Country names and common aliases count.
One of the six countries that signed the Treaty of Rome in 1957.
The ten-country enlargement of 1 May 2004.
State names or two-letter postal abbreviations. No territories.
Use the full state name or its postal abbreviation.
The three-country enlargement of 1 January 1995.
The first 30 elements. Element names and chemical symbols both count.
Atomic numbers 1–10, inclusive. Names or symbols accepted.
Both endpoints count. Names or symbols accepted.
Both endpoints count. Names or symbols accepted.
Base units only. Unit names, plurals and symbols are accepted.
Both conditions must match. Names and symbols accepted.
The eight planets. Dwarf planets are not included.
One of the four terrestrial planets.
Only the four outer planets. Dwarf planets do not count.
The four large moons first observed by Galileo in 1610.
One of the four giant planets.
The eight planets. Count letters in the English name.
Published novels only. Unfinished works and juvenilia do not count.
First publication year. Three novels fit.
First publication year. Three novels fit.
One of her six completed novels. The title itself names a place.
Use the complete title of one of her six completed novels.
One of her six completed and published novels.
Tournaments from 1930 through 2022. Germany includes West Germany.
Tournaments from 1930 through 2022. Country names accepted.
Tournaments from 1930 through 2022.
Titles won from 1930 through 2022, inclusive.
Count only men’s tournaments from 1930 through 2022.
A title in any tournament from 1930 through 1966. Germany includes West Germany.
A codeword such as those used in radio communication. Not just a letter.
The first half of the phonetic alphabet. Enter the codeword.
The second half of the phonetic alphabet. Enter the codeword.
Use the official spelling. Alfa, not Alpha, is four letters.
Count letters in the official spelling, ignoring punctuation.
Use the official spelling. Enter the full codeword.
Feature films released from 1995 through 2009. Short films do not count.
The release year must be between 1990 and 1999, inclusive.
The release year must be between 2000 and 2009, inclusive.
Use the original release year, from 1995 through 2009.
Count words in its English title. A hyphenated title counts as one word.
Use the full English title, including an opening “The”. Enter the film title.
Use the 2025–26 division alignment. Current franchise names or listed nicknames count.
Use the 2025–26 division alignment. Current franchise names or listed nicknames count.
Use the 2025–26 division alignment. Current franchise names or listed nicknames count.
Use the 2025–26 division alignment. Current franchise names or listed nicknames count.
Use the 2025–26 division alignment. Current franchise names or listed nicknames count.
Use the 2025–26 division alignment. Current franchise names or listed nicknames count.
The four annual Grand Slam tournaments, as played in 2024. Enter the tournament name.
Use the host cities of the four Grand Slam tournaments in 2024.
Use the host countries of the four Grand Slam tournaments in 2024. United Kingdom and England are accepted for Wimbledon.
Enter a tournament, not its city. Use the 2024 locations.
Use the playing surfaces of the four Grand Slams in 2024.
Use the 2024 host cities. Enter the city, not the tournament.
Use the official edition year. Tokyo 2020 counts even though it was held in 2021.
Enter the host city, not the host country. Later editions are outside this set.
Use host cities of the Summer Games, not the Winter Games.
Use the official edition year, including Tokyo 2020.
City names only. Pyeongchang is in South Korea, distinct from Pyongyang.
Completed Summer Games from 1896 through 2024. Future hosts do not count.
1960–2024 finals. Use historical national-team identities; Germany includes West Germany.
Count championships from 1960 to 2024. Germany includes West Germany.
Use the winning team’s historical identity. Russia and Czechia do not replace former states here.
A team must have won at least one edition in this date range.
Editions from 1960 through 1976. Enter the historical team name; Germany includes West Germany.
At least one final appearance from 1960–2024, but no title. Keep Yugoslavia distinct from successor states.
UN M49 grouping, September 2026. Sovereign UN member states only; territories are excluded. Mexico counts as Central America in this grouping.
UN M49 grouping, September 2026. Sovereign UN member states only; territories are excluded. Mexico counts as Central America in this grouping.
UN M49 grouping, September 2026. Sovereign UN member states only; territories are excluded. Mexico counts as Central America in this grouping.
UN M49 grouping, September 2026. Sovereign UN member states only; territories are excluded. Mexico counts as Central America in this grouping.
UN M49 grouping, September 2026. Sovereign UN member states only; territories are excluded. Mexico counts as Central America in this grouping.
The five sovereign Nordic countries. Autonomous territories do not count.
September 2026 names. Enter a capital city, not a country. Territories are excluded.
September 2026 names. Enter a capital city, not a country. Territories are excluded.
September 2026 names. Enter a capital city, not a country. Territories are excluded.
September 2026 names. Use constitutional capitals: Sucre counts for Bolivia; La Paz is its seat of government.
September 2026 names. UN M49 grouping includes Mexico. Enter the capital city.
September 2026 names. UN member states in Eastern Asia only. Territories are excluded.
Use NOAA’s five-basin convention. Southern Ocean and Antarctic Ocean are accepted names for the fifth.
Enter a lake name. Lake St. Clair is outside the five-lake set.
The five North American Great Lakes; exclude a lake wholly within one country.
Countries the river flows through or along as a border. Other drainage-basin countries do not count.
The lake’s shoreline, not the wider drainage basin.
Current capital cities directly on the main river, in the September 2026 reference set.
The seven modern winners. Ancient wonders and honorary candidates are excluded.
Countries containing one of the seven modern winners; honorary candidates are excluded.
Enter the monument or site, not the country. Only the seven modern winners count.
Enter the monument or site. Mexico is outside South America.
The four large islands in the Japanese foreign ministry’s description. Smaller islands, including Okinawa, are outside this set.
Use the Carstensz (Messner) version: Puncak Jaya represents Oceania. Kosciuszko belongs to the alternate Bass list and does not count here.
The five countries that signed the Bangkok Declaration on 8 August 1967. Later members do not count.
The four signatories of the 1991 Treaty of Asunción. Use the country, not a later accession or an associate member.
The five founder members at the Baghdad Conference, 10–14 September 1960. Current membership is not the rule.
Five neighbouring sovereign states. A nearby country without a shared border does not count.
The 12 initial inscriptions span seven countries. Germany includes the Federal Republic of Germany.
Use the government’s administrative, legislative or judicial capital. Johannesburg is not one of these three.
Classify by how a rock forms. Enter the class, not an individual rock such as granite.
The three main types: plates move together, apart or past one another. Enter a boundary type. Broad boundary zones without a defined motion are excluded.
The three-part crust–mantle–core model. Mechanical layers such as the lithosphere are a different classification.
The five layers in NASA’s five-major-layer overview, from the troposphere to the exosphere. Ozone layer and ionosphere are not separate entries in this five-layer list.
Use A, B, AB or O. Rh-positive and Rh-negative are a separate classification; the letter O is not zero.
Include left or right. A valve, vessel or the unspecific word ventricle is not a chamber name.
The three main cellular components. Plasma is the liquid component and is excluded; platelets are cell fragments.
The cerebrum, cerebellum and brain stem classification. A lobe is a subdivision, not a separate main part here.
Use the RNA triplet, with U rather than T. Alternative genetic codes are outside this question.
Use a body region, not an appendage. Wings, antennae and legs are excluded.
The two living monotreme groups, at common-name level. Enter platypus or echidna, not a species or an extinct group.
Use one of the three scientific family names. Alligators and caimans belong to the same family.
The tissue classification: skeletal, cardiac or smooth. Individual muscles do not count.
Use the EIA’s five broad categories. Tidal and wave energy are not separate entries in this particular list.
The EIA’s coal, petroleum and natural gas grouping. Refined products such as petrol are not separate categories.
The three standard physical mechanisms. Enter the mechanism, not a material or an energy source.
Use a fundamental interaction, not an everyday force such as friction or buoyancy.
The ten reference minerals, from hardness 1 to 10. Use a mineral, not a hardness number.
The belt asterism, not any star in the larger Orion constellation. Common names or Bayer designations count.
The Northern Hemisphere asterism contains three stars in three different constellations.
The five probes in NASA’s Voyager FAQ. An escape trajectory is not the same as having crossed into interstellar space.
The April 1970 flight crew. Ken Mattingly was replaced before launch and does not count.
The command module and lunar module call signs. Saturn V is the launch vehicle, not a call sign.
Actual Jupiter orbit insertion, not a flyby or a planned arrival. Two NASA spacecraft qualify.
The first two missions selected for the program: an asteroid mission and a Mars mission. Enter a mission, not a rover alone.
The interior below the photosphere. Atmospheric layers such as the corona are excluded.
The three standard outcomes: white dwarf, neutron star or stellar-mass black hole. A supernova is an event, not the remnant.
The three aligned Tharsis Montes volcanoes. Olympus Mons is in the broader Tharsis region but is not one of this trio.
The six flights Vostok 1–6, from 1961 to 1963. Training-group membership alone is not enough.
The three named human-body test models, not an astronaut or a soft-toy passenger.
Professor Oak’s three initial choices in the original Kanto games. Pikachu is the starter in Yellow, a different version.
The three virtues in Nintendo’s Zelda guide. Enter the virtue, not a character or goddess.
The four selectable characters in the 1988 NES release, not Japan’s game later called The Lost Levels.
The three main races. Campaign-only factions or individual units do not count.
The three default dimension identifiers in the documented game. Mods and custom dimensions are excluded.
The four repeating seasons in the standard game. Fall and Autumn are accepted as the same season.
The 2002 ceremony honoured films released in 2001. Three films were nominated.
Count awards won by one film, not nominations or franchise totals. Three films reached 11 wins in this period.
Original Japanese theatrical releases from 2000 through 2009. Short films and works he only wrote or produced are excluded.
The Academy’s two qualifying sequels through that ceremony. Later winners are outside the date limit.
The three films released in 2001–2003. The Hobbit trilogy is a separate series. Subtitles alone are accepted.
The three films of Nolan’s Dark Knight trilogy. Other directors’ Batman films do not count.
The conventional four-novel grouping, not the older Six Classic Novels list. Listed English translations and Chinese titles count.
The four Vedas themselves. Upanishads and Vedangas are different classifications, not additional answers.
The two epic poems, not a later work such as Virgil’s Aeneid. English titles count.
The three main parts, not an individual canto. Italian names and their English translations are accepted.
The three novelist sisters. A first name, full name or their published pen name counts; their brother does not.
The first three Literature prizes. Use a laureate’s name or listed surname, not a title of a book.
The five original categories. Physiology or Medicine is one category; Economic Sciences was established later.
Sebastiano Serlio’s five-order classification includes Greek and Roman orders. Enter an order, not a building.
The four process colours, not the RGB colours of emitted light. Full colour names or C, M, Y and K count.
The northern and southern classical traditions, not folk genres, instruments or individual ragas.
English or French forms of the three official words count. Enter one value rather than the full motto.
The six colours specified by Schedule 1 of the Constitution. Yellow is accepted for gold and red for chilli red.
World Rugby’s 2026 law lists five methods, including the penalty try. Do not use rugby league scoring.
The nine named dismissals in the 2017 Code, fourth edition (2026). Retired out is covered elsewhere; handled the ball is no longer a separate law.
The five Olympic event categories, including gender where needed. There is no mixed singles event.
Six event types, each contested by women and men. Individual pursuit and the standalone elimination race were not Olympic medal events.
The six colours in standard snooker. Red balls are worth one; the white cue ball is not an object ball.
All six kinds count, including the pawn. Enter an English name, not a notation letter or a fairy-chess piece.
The award winners in the 2010, 2014, 2018 and 2022 tournaments. Sharing the highest goal total without winning the tiebreak does not qualify.
Senior women’s tournaments from 1991 through 2023. Men’s and youth competitions do not count.
The three-week stage races named by the UCI. One-day classics are not Grand Tours.
The one-day World Cup from 1975 through 2019, not the T20 World Cup. The West Indies count as a team.
Count team championships, not drivers’ championships. Enter the team name, with sponsor or engine labels optional.
Standard seven-a-side netball. Full names or the standard two-letter bib abbreviations count; Centre also accepts C.
English letter names or Greek characters count. Archaic letters such as digamma are outside the 24-letter set.
One dot or one dash in International Morse code. Enter the letter, not the punctuation signal or a NATO codeword.
Use the base form. Modal auxiliaries such as can are a separate group.
The nine core modals. Cambridge lists dare, need, ought to and used to separately as semi-modals.
The three person categories. Enter the category, not an example pronoun; ordinal words or numbers count.
The two standard number categories in English grammar. Enter the category, not an example noun.
The two paired mark types used for questions and exclamations. Enter an English or Spanish name, not a bare symbol.
Kanji and the two kana scripts. Rōmaji is romanization and is outside this three-script classification.
XML 1.0, not the much larger HTML entity list. Enter the name alone, such as amp, without & or ;.
The four new prefix names. Use the word, not the case-sensitive symbol; ronna and ronto have opposite scales.
The nine single words in the reference list, including how. Do not enter a longer phrase such as how many.
The guide’s five types. English or French names count; enter a name, not a marked letter or bare accent.
Name a sea at either end of the canal, not a lake within it or an ocean reached through another waterway.
Territories, not provinces. Full names and the postal abbreviations YT, NT and NU count.
The two sovereign countries sharing Hispaniola, also called La Española. Dominica is a different island and country.
States, not territories. Full names or the abbreviations NSW, VIC, QLD, SA, WA and TAS count; ACT and NT do not.
Use the headquarters in New York or the main offices in Geneva, Vienna and Nairobi. Other UN agency locations are outside this four-city set.
Three sovereign neighbours, including borders following rivers. Maritime neighbours and countries farther south do not count.
Episodes IV, V and VI, originally released in 1977, 1980 and 1983. Enter a title; the subtitle alone counts.
The six leading Bond actors in the Eon series through No Time to Die. Non-Eon productions, television and voice roles do not count.
Original releases from 1960 through 1969. Five titles fit; a remake or a film Kurosawa only wrote does not count.
The three theatrical films released in 1981, 1984 and 1989. Television episodes and later sequels do not count; subtitles alone are accepted.
Ceremony year, not film release year. Five winners fit; a nomination alone does not count.
The winning films at the 2002–2006 ceremonies. Animated short films and nominated features that did not win are outside the set.
2025–26 alignment. Enter a franchise name or accepted nickname.
The four European G7 member countries in September 2026. Enter a city.
2025–26 alignment. Enter a franchise name or accepted nickname.
Sovereign countries with no sea coast. Enter a country, not a capital.
2025–26 team locations. Use a team name rather than its city.
North and South America. Enter the site, not its country.
2025–26 team locations. Enter a team name or accepted nickname.
Only the seven modern winners. Enter the site, not a country.
Count titles from 1960–2024. Germany includes West Germany.
Use the lake’s name without the word Lake. The five North American Great Lakes only.
Editions from 1990 through 1999. Enter the host city.
Use NOAA’s five ocean names without the word Ocean.
Editions from 2000 through 2009. Enter the host city.
Enter one of the two capital cities in the September 2026 reference set.
Natural satellites of Mars in the October 2026 reference set. Enter the moon’s name.
IUPAC group 18, atomic numbers 1–30. An element name or chemical symbol is accepted.
The three member countries in the October 2026 reference set. Enter a country, not a capital.
The four senior Grand Slam tournaments in the 2024 season. Enter the tournament, not a city.
NASA’s five major moons only. Smaller satellites are outside this October 2026 set.
Group 1 metals, atomic numbers 1–30. Hydrogen is not a metal. Names or symbols are accepted.
The six GCC members in the October 2026 reference set. Enter a sovereign country, not a city or emirate.
Australian Open, Roland Garros, Wimbledon and US Open. Use a sovereign country; England alone is outside this rule.
The five named on NASA’s planet overview in October 2026. Candidate dwarf planets are excluded.
IUPAC group 17, atomic numbers 1–30. An element name or chemical symbol is accepted.
Only A, E, I, O and U. Use a full codeword from the NATO chart, not a single letter. Alfa also accepts Alpha.
IUPAC group 2, atomic numbers 1–30. An element name or chemical symbol is accepted.
Two identical letters next to each other in the official full spelling. Juliett also accepts Juliet as an alias.
The eight planets in NASA’s October 2026 reference set. Excludes dwarf planets and quasi-satellites.
The three prime crew members of the December 1968 mission. Full names or listed surnames count; backup crew members do not.
The Tragedies section of Folgerpedia’s William Shakespeare’s plays page, checked October 2026. Use a play title; this is not the First Folio classification.
The six jumps and throws in the standard ten-event programme. Running events and indoor combined events are excluded.
The five permanent members in the October 2026 reference set. Elected two-year members do not qualify.
The seven SI base units in the BIPM table. Count letters in the unit symbol, not its name. Names, plurals or the exact symbols kg, mol and cd count.
The UN’s six official languages in the October 2026 reference set. Use the language’s English name, not a country name.
The seven astronauts introduced in April 1959, including Deke Slayton. Full names or listed surnames count, whether or not they flew a Mercury mission.