If you are tired of trivia rounds where the answer is always Paris, Jupiter, or Leonardo da Vinci, this one is for you.
These 150 hard trivia questions skip the obvious stuff and lean into treaties, language quirks, scientific constants, obscure capitals, art history, record-book sports, and the facts that make even a strong trivia player stare at the ceiling for a while.
Fair warning: “hard” should not mean vague. I rebuilt this guide in September 2026 so record questions are precisely scoped and disputed “first,” “only,” and “most” claims are either qualified or left out.
History & Geography Brain-Busters
These are the questions for the person who remembers the treaty name, not just the war, and can find the tiny capital without a map.
- Q: Which group of treaties ended the Thirty Years’ War in 1648?
A: The Peace of Westphalia - Q: What 1494 treaty divided newly claimed lands outside Europe between Spain and Portugal?
A: The Treaty of Tordesillas - Q: What 1618 event in Bohemia helped ignite the Thirty Years’ War?
A: The Second Defenestration of Prague - Q: Which Byzantine emperor ordered the compilation later known as the Corpus Juris Civilis?
A: Justinian I - Q: Which Haitian leader proclaimed Haiti’s independence on January 1, 1804?
A: Jean-Jacques Dessalines - Q: Which 1555 settlement is associated with the principle cuius regio, eius religio?
A: The Peace of Augsburg - Q: In what year did the Meiji Restoration begin in Japan?
A: 1868 - Q: Who is generally considered the first Roman emperor?
A: Augustus - Q: Which French monarch reigned for more than 72 years, the longest reign in French history?
A: Louis XIV - Q: What is the capital of Palau?
A: Ngerulmud - Q: What sea is unique because its boundaries are defined by ocean currents rather than land?
A: The Sargasso Sea - Q: Which European river passes directly through Vienna, Bratislava, Budapest, and Belgrade?
A: The Danube - Q: Which two countries are doubly landlocked, meaning every neighboring country is itself landlocked?
A: Liechtenstein and Uzbekistan - Q: What is the world’s largest landlocked country by area?
A: Kazakhstan - Q: What is the deepest lake in the world?
A: Lake Baikal - Q: What strait separates Alaska from Russia?
A: The Bering Strait - Q: Which continent lies in all four hemispheres?
A: Africa - Q: What is the southernmost capital city of a sovereign country?
A: Wellington, New Zealand - Q: Which country is almost entirely surrounded by Senegal except for its Atlantic coastline?
A: The Gambia - Q: Which country has coastlines on both the Caspian Sea and the Persian Gulf?
A: Iran - Q: What is the capital of Burkina Faso?
A: Ouagadougou - Q: What is the capital of Kyrgyzstan?
A: Bishkek - Q: What is the capital of Bhutan?
A: Thimphu - Q: Which ancient people built Petra, the rock-cut city in present-day Jordan?
A: The Nabataeans - Q: Which Carthaginian general famously crossed the Alps during the Second Punic War?
A: Hannibal
Science & Technology Brain-Busters
Here the easy periodic-table questions are gone. Expect constants, computing history, astronomy, cell biology, and the terms people vaguely remember from class.
- Q: What is the exact numerical value of the Avogadro constant?
A: 6.02214076 × 10²³ mol⁻¹ - Q: What is the SI derived unit of catalytic activity?
A: The katal - Q: Which SI base unit measures luminous intensity?
A: The candela - Q: Which element has atomic number 74?
A: Tungsten - Q: Which two letters do not appear in any current chemical element symbol?
A: J and Q - Q: What quantum-mechanical principle says no two identical fermions can occupy the same quantum state simultaneously?
A: The Pauli exclusion principle - Q: What approximate stellar mass marks the Chandrasekhar limit for a stable white dwarf?
A: About 1.4 solar masses - Q: How many classical Lagrange points are there in a two-body orbital system?
A: Five - Q: What is the largest moon in the Solar System?
A: Ganymede - Q: Which planet has a sidereal rotation period longer than its orbital period around the Sun?
A: Venus - Q: What enzyme unwinds the DNA double helix during replication?
A: Helicase - Q: What process copies genetic information from DNA into RNA?
A: Transcription - Q: In which cell structure are ribosomal subunits assembled?
A: The nucleolus - Q: To what phylum do tardigrades belong?
A: Tardigrada - Q: What SI unit is equivalent to one cycle per second?
A: The hertz - Q: In quantum electrodynamics, what particle mediates the electromagnetic force?
A: The photon - Q: How many quark flavors are recognized in the Standard Model?
A: Six - Q: Which noble gas has atomic number 54?
A: Xenon - Q: Which element uses the chemical symbol W?
A: Tungsten - Q: What 1941 machine is recognized as the first fully functional program-controlled electromechanical digital computer?
A: Konrad Zuse’s Z3 - Q: What address hosted the world’s first website?
A: info.cern.ch - Q: Which IBM/BellSouth device is recognized by the Computer History Museum as the first smartphone?
A: The Simon Personal Communicator - Q: Who created Archie, widely recognized as the first Internet search engine?
A: Alan Emtage - Q: What IBM storage unit introduced in 1956 became the first commercial magnetic disk drive system?
A: The IBM 350 Disk Storage Unit - Q: Who coined the term “artificial intelligence” for the 1956 Dartmouth research project?
A: John McCarthy
Literature & Language Brain-Busters
This round rewards the reader who wandered past the usual school reading list and remembers a few linguistics terms along the way.
- Q: Who wrote The Master and Margarita?
A: Mikhail Bulgakov - Q: Who wrote Pale Fire?
A: Vladimir Nabokov - Q: Which Nigerian author wrote Things Fall Apart?
A: Chinua Achebe - Q: Who wrote The Name of the Rose?
A: Umberto Eco - Q: Who wrote If on a winter’s night a traveler?
A: Italo Calvino - Q: Who wrote the poem The Waste Land?
A: T. S. Eliot - Q: Who wrote One Hundred Years of Solitude?
A: Gabriel García Márquez - Q: Which Edgar Allan Poe detective appears in “The Murders in the Rue Morgue”?
A: C. Auguste Dupin - Q: Which novelist created the fictional Yoknapatawpha County?
A: William Faulkner - Q: Which author wrote the novel A Void without using the letter E in the original French?
A: Georges Perec - Q: What is a text deliberately written while avoiding a particular letter called?
A: A lipogram - Q: What is a word that appears only once in a particular text or corpus called?
A: A hapax legomenon - Q: Which European language is generally classified as a language isolate?
A: Basque - Q: What writing style alternates direction from one line to the next, like an ox turning while plowing?
A: Boustrophedon - Q: What sound-change pattern describes major consonant shifts from Proto-Indo-European into Proto-Germanic?
A: Grimm’s Law - Q: What figure of speech uses a part to represent the whole, as in “all hands on deck”?
A: Synecdoche - Q: What figure of speech substitutes a closely related term, as when “the crown” means the monarchy?
A: Metonymy - Q: Who wrote the 1952 novel Invisible Man?
A: Ralph Ellison - Q: Which Argentine writer wrote “The Aleph”?
A: Jorge Luis Borges - Q: Who wrote The Murder of Roger Ackroyd?
A: Agatha Christie
Art, Music & Film Brain-Busters
Names matter here: painters, composers, architects, directors, and the works that are easy to recognize but harder to attribute under pressure.
- Q: Who painted Las Meninas?
A: Diego Velázquez - Q: Who painted The Arnolfini Portrait?
A: Jan van Eyck - Q: Who painted The Garden of Earthly Delights?
A: Hieronymus Bosch - Q: Who sculpted The Thinker?
A: Auguste Rodin - Q: Who composed The Rite of Spring?
A: Igor Stravinsky - Q: Who composed the opera Turandot?
A: Giacomo Puccini - Q: Who composed Boléro?
A: Maurice Ravel - Q: Who composed Rhapsody in Blue?
A: George Gershwin - Q: Who directed Rashomon?
A: Akira Kurosawa - Q: Who directed 8½?
A: Federico Fellini - Q: Who directed The Seventh Seal?
A: Ingmar Bergman - Q: Who directed Spirited Away?
A: Hayao Miyazaki - Q: Which film became the first non-English-language movie to win the Academy Award for Best Picture?
A: Parasite - Q: Which actor became the first man to win three Academy Awards for Best Actor?
A: Daniel Day-Lewis - Q: Which composer wrote the four-opera cycle Der Ring des Nibelungen?
A: Richard Wagner - Q: Who founded the Bauhaus school in 1919?
A: Walter Gropius - Q: Who designed Fallingwater?
A: Frank Lloyd Wright - Q: Who painted Black Square?
A: Kazimir Malevich - Q: In which city did the Dada movement coalesce around the Cabaret Voltaire in 1916?
A: Zurich - Q: Who painted The Treachery of Images, the work featuring a pipe and the phrase “Ceci n’est pas une pipe”?
A: René Magritte
Sports & Games Brain-Busters
These are record-book questions with enough specificity to keep them fair, plus a few rules that can humble someone who watches the sport every week.
- Q: How many Olympic medals did Michael Phelps win in total?
A: 28 - Q: Who scored a record 13 goals at a single FIFA World Cup, in 1958?
A: Just Fontaine - Q: Who owns MLB’s record 56-game hitting streak?
A: Joe DiMaggio - Q: Who holds the record with nine Wimbledon women’s singles titles?
A: Martina Navratilova - Q: Which NFL team completed the league’s only perfect season including the postseason?
A: The 1972 Miami Dolphins - Q: Which city hosted the first modern Olympic Games in 1896?
A: Athens - Q: What is the official marathon distance in kilometers?
A: 42.195 kilometers - Q: What is the highest possible checkout in standard darts?
A: 170 - Q: What is the standard maximum break in snooker without a free ball?
A: 147 - Q: In golf, what score relative to par is an albatross?
A: Three under par - Q: Who donated the trophy that became known as the Stanley Cup?
A: Lord Stanley of Preston - Q: Which country won the first FIFA World Cup in 1930?
A: Uruguay - Q: Who scored 100 points in a single NBA game in 1962?
A: Wilt Chamberlain - Q: Who became Formula 1’s youngest World Drivers’ Champion in 2010?
A: Sebastian Vettel - Q: Who was the first woman to run and complete the Boston Marathon, in 1966?
A: Roberta “Bobbi” Gibb - Q: What trophy is recognized as the oldest in international sport?
A: The America’s Cup - Q: What chess capture allows a pawn to take an opposing pawn that has just advanced two squares past its attack square?
A: En passant - Q: What is the only standard chess move in which two pieces of the same color move on the same turn?
A: Castling - Q: Who completed the tennis Golden Slam by winning all four majors and Olympic singles gold in 1988?
A: Steffi Graf - Q: How many legal deliveries make up a standard over in modern cricket?
A: Six
Food & Culture Brain-Busters
This is the round where knowing what something tastes like does not help nearly as much as knowing how it is made.
- Q: Which part of the Crocus sativus flower is harvested to make saffron?
A: The stigmas - Q: Which amino acid is most closely associated with the taste sensation umami?
A: Glutamate - Q: What mold species is traditionally used to make koji for products such as miso and sake?
A: Aspergillus oryzae - Q: What plant must tequila be made from under its protected designation?
A: Blue agave, Agave tequilana - Q: What was garum in the ancient Mediterranean world?
A: A fermented fish sauce - Q: Which grain is traditionally used to make Ethiopian and Eritrean injera?
A: Teff - Q: Biltong is a cured-meat specialty associated with which country?
A: South Africa - Q: Pu-erh tea is traditionally associated with which Chinese province?
A: Yunnan - Q: What type of tea leaf is ground to produce matcha?
A: Tencha - Q: What kind of cheese is paneer?
A: A fresh acid-set cheese - Q: What is aquafaba?
A: The cooking liquid from legumes, especially chickpeas - Q: What is beurre manié made from?
A: Soft butter and flour kneaded together - Q: What three vegetables form the classic French mirepoix?
A: Onion, carrot, and celery - Q: What are the five classical French mother sauces?
A: Béchamel, velouté, espagnole, tomato, and hollandaise - Q: Which receptor is activated by capsaicin to create the sensation of chili heat?
A: TRPV1 - Q: The Maillard reaction primarily occurs between amino compounds and what type of sugars?
A: Reducing sugars - Q: What are the three principal grape varieties used in Champagne?
A: Chardonnay, Pinot Noir, and Meunier - Q: What is nixtamalization?
A: Treating maize with an alkaline solution before processing - Q: Cassoulet is most closely associated with which region of France?
A: Southwestern France, especially Languedoc - Q: Mole poblano is especially associated with which Mexican state?
A: Puebla
Wildcard Brain-Busters
No theme to lean on now. This last round jumps from number theory to Nobel history, flags, classical mythology, chemistry, and the ocean floor.
- Q: What famous unproven conjecture says every even integer greater than 2 can be written as the sum of two primes?
A: Goldbach’s conjecture - Q: What number is famous as the smallest positive integer expressible as the sum of two positive cubes in two different ways?
A: 1729 - Q: What equation links the constants e, i, π, 1, and 0 in a single celebrated identity?
A: Euler’s identity: e^(iπ) + 1 = 0 - Q: How many sides and boundary components does a standard Möbius strip have?
A: One side and one boundary component - Q: How many Platonic solids are there?
A: Five - Q: What number has no standard Roman numeral?
A: Zero - Q: What is the only letter that does not appear in the name of any U.S. state?
A: Q - Q: Who is the only person to have won Nobel Prizes in two different sciences?
A: Marie Curie, in Physics and Chemistry - Q: Which modern chess piece evolved from a piece known as the elephant in earlier forms of the game?
A: The bishop - Q: Which Greek Muse is associated with astronomy?
A: Urania - Q: Which Roman god is traditionally depicted with two faces?
A: Janus - Q: What do the letters SOS officially stand for?
A: Nothing; SOS was chosen as a distinctive Morse-code distress signal - Q: How many SI base units are there?
A: Seven - Q: How many bits are in a modern byte?
A: Eight - Q: What does CAPTCHA stand for?
A: Completely Automated Public Turing test to tell Computers and Humans Apart - Q: Which country has the world’s only national flag that is not a quadrilateral?
A: Nepal - Q: What is the name of the deepest known point in Earth’s oceans?
A: Challenger Deep - Q: Which element’s name comes from Hafnia, the Latin name for Copenhagen?
A: Hafnium - Q: Which chemical element was named for the continent of Europe?
A: Europium - Q: Which element, atomic number 105, was named after the Russian research city of Dubna?
A: Dubnium
How I Checked the Hardest Questions
Hard trivia is especially vulnerable to confident-sounding half-truths, so the questions most likely to be disputed were checked against specialist and primary sources. NOAA confirms the Sargasso Sea is the only sea without a land boundary, while the International Commission for the Protection of the Danube River identifies the four national capitals directly on the Danube.
For science and technology, I used NIST for exact SI constants, the Computer History Museum for early computing, and CERN for the birth of the Web.
For record-book questions, the sources include NobelPrize.org, FIFA, MLB, and the WTA.
Need an Easier Round Next?
Recover with the fun trivia questions, go broad with the 700-question trivia challenge, or stay competitive with science trivia and sports trivia.
Plan another round with our hard trivia rounds guide, which groups related quizzes and ways to play.
Ellie Simons creates and edits Random Trivia. She researches trivia using primary and authoritative sources whenever possible and is currently reviewing the site's older trivia library for accuracy, clarity, and playability. Read more on the About page.
Explore more rounds in our General knowledge trivia collection.
About this quiz
Site editor: Ellie Simons. Read our Trivia Methodology to learn how questions are researched and updated. Page last updated: . Report an error.