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Quizzes > Movies

Big Bang Theory trivia: how much do you really remember?

Quick, free Big Bang Theory quiz with instant results and fun facts.

Editorial: Review CompletedCreated By: Toine CloostermanUpdated Aug 23, 2025
Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art illustration for Big Bang Theory trivia quiz on golden yellow background

This Big Bang Theory trivia quiz helps you check what you remember about Sheldon, Penny, and the gang. Finish the round, see your score, and learn a few fun facts along the way. Want more challenges? Try our Big Bang Theory quiz and TBBT quiz, or explore the Big Bang Theory character quiz.

What catchphrase does Sheldon often say after playing a prank?
Bazinga!
Booyah!
Gotcha!
Kaboom!
Sheldon uses "Bazinga!" to signal that a comment or action was meant as a prank or joke. The catchphrase became one of the show's most iconic lines and is frequently used in merchandising. Sheldon first utters it in the second season when testing Leonard's gullibility.
At which institution do the main characters work?
Oxford
Caltech
MIT
Stanford
Leonard, Sheldon, Howard, and Raj all work at the California Institute of Technology (Caltech) in Pasadena, California. Caltech serves as the primary setting for their scientific research and many comedic scenarios. The show often references real Caltech labs and departments.
What is Leonard's last name?
Higginbotham
Hofstadter
Hamilton
Hansen
Leonard's full name is Dr. Leonard Hofstadter, which reflects his German-Jewish heritage. He is an experimental physicist specializing in quantum mechanics. The name Hofstadter also appears in cognitive science through Douglas Hofstadter, but here it identifies Leonard.
Which musical instrument does Sheldon play?
Violin
Cello
Piano
Saxophone
Sheldon cooper actively plays the cello throughout the series, showcasing his classical music interest. He struggles with some pieces but is proud of his progress. His playing appears in multiple episodes, including holiday specials.
Where does Penny work as a waitress when she first appears?
Olive Garden
Starbucks
The Cheesecake Factory
IHOP
When Penny is first introduced, she works at The Cheesecake Factory, a real-life restaurant chain, to pay her rent in Pasadena. Her job there is a recurring plot device in early seasons. It contrasts with the scientists' careers and highlights Penny's initial aspirations.
What is Howard's profession?
Aerospace engineer
Electrical engineer
Mechanical engineer
Civil engineer
Howard Wolowitz is an aerospace engineer, notable for his work on engineering components for the International Space Station and later flying on the shuttle. Unlike the other main characters, he does not hold a doctorate, which is often a joke point in the series.
What must Raj have in order to be able to speak to women?
Coffee
Chocolate
Painkillers
Alcohol
Rajesh Koothrappali suffers from selective mutism and cannot speak to women unless he's had alcohol. This running gag appears from the pilot through several seasons, often leading to comedic scenarios. Over time, he gradually overcomes this with therapy and confidence-building.
Who owns the comic book store frequented by the characters?
Leslie Winkle
Stuart Bloom
Barry Kripke
Zack Johnson
Stuart Bloom is the mild-mannered, often financially struggling owner of the local comic book store. He first appears in Season 2 and becomes a recurring character. The store serves as a gathering spot for the guys outside of Caltech.
What is the name of Sheldon's mother?
Amy Cooper
Mary Cooper
Leslie Cooper
Beverly Cooper
Sheldon's mother is Mary Cooper, a devout Christian from Texas who often clashes with Sheldon's atheism. She appears several times throughout the series, providing insights into Sheldon's upbringing. Mary's down?to?earth nature contrasts with her son's scientific worldview.
What profession does Leonard's mother, Beverly Hofstadter, have?
Sociologist
Pediatrician
Neuroscientist
Oncologist
Beverly Hofstadter is a psychiatrist and neuroscientist who treats her son with clinical detachment. She frequently analyzes Leonard's behavior rather than showing maternal affection. Her character highlights the theme of parental influence in the series.
Who performs the theme song for The Big Bang Theory?
Green Day
Imagine Dragons
Barenaked Ladies
Foo Fighters
The Canadian band Barenaked Ladies wrote and performed the catchy theme song, summarizing the history of the universe from the Big Bang to modern times. The song became one of the show's most recognizable elements from its debut in 2007. It appears in every episode's opening credits.
Which famous physicist made a cameo as himself on the show?
Neil deGrasse Tyson
Isaac Newton
Albert Einstein
Stephen Hawking
Stephen Hawking appears in multiple episodes, often humorously interacting with Sheldon. His first cameo is in Season 2, Episode 11, where Sheldon attempts to get his autograph. The real-life physicist's involvement added authenticity and fan excitement.
What is the name of the formal document Sheldon uses to define roommate responsibilities?
The Coexistence Contract
The Friendship Protocol
The Housing Charter
The Roommate Agreement
Sheldon's Roommate Agreement is a lengthy legalistic document outlining every aspect of cohabitation with Leonard. It includes clauses on thermostat settings, guest policies, and dispute resolution. The contract is a recurring plot point and source of comedy.
What subatomic particle are Leonard and Sheldon most interested in finding?
Graviton
Positron
Neutrino
Higgs boson
Leonard and Sheldon often reference the Higgs boson, the particle responsible for the Higgs field and mass generation. Their experiments and discussions revolve around high-energy physics and this elusive particle. The show pokes fun at the quest for scientific discovery.
What is the name of Howard's mother?
Bernadette Wolowitz
Debbie Wolowitz
Helen Wolowitz
Mary Wolowitz
Howard's overbearing mother is Debbie Wolowitz, known only by voice until late in the series. Her distinctive shrill tone and commanding personality provide comic relief. She lives in New Jersey and communicates with Howard primarily by phone.
Which game do the guys frequently play together?
Monopoly
Risk
Dungeons & Dragons
Settlers of Catan
The group plays Dungeons & Dragons in the episode "The Bath Item Gift Hypothesis" and other installments. Their tabletop sessions showcase their geek culture and camaraderie. The game often leads to memorable one-liners and character development.
What is Sheldon's favorite number?
42
108
7
73
Sheldon states that 73 is the best number because it is the 21st prime, and its mirror, 37, is the 12th prime, with further binary properties. He elaborates on this in Season 4, Episode 10. The explanation became a popular trivia moment among fans.
In which season does Howard leave for space?
Season 5
Season 4
Season 6
Season 7
Howard departs for a mission to the International Space Station in Season 5, after training with NASA. This plotline provides character growth and new comedic situations from orbit. The show filmed parts of his flight preparation to add realism.
What is the name of Raj's sister?
Aditi Koothrappali
Maya Koothrappali
Priya Koothrappali
Anu Koothrappali
Rajesh's sister is Priya Koothrappali, who works as a lawyer in London and briefly dates Leonard. Her storyline explores cultural and relationship dynamics. She appears in multiple episodes across several seasons.
What is the name of Sheldon and Amy's website for their flag videos?
Flag Facts
Amy's Flags
Sheldon's Flags
Fun with Flags
Sheldon and Amy cohost "Fun with Flags," an educational web series exploring vexillology. The spinoff appears in several episodes, showcasing their quirky chemistry. They discuss flag history and trivia in each segment.
What scientific journal do Sheldon and Amy publish their first co-authored paper in?
Nature
Science
Astrophysical Journal
Physical Review Letters
Sheldon and Amy collaborate on a paper published in the prestigious journal Nature, marking a milestone in their professional and personal relationship. The publication occurs in Season 11 and represents their scientific breakthrough. This achievement leads to further plot developments, including Nobel Prize discussions.
What is the name of the children's TV show that Sheldon and Penny watch together?
Peppa Pig
Dora the Explorer
Sesame Street
Blue's Clues
In several episodes, Penny and Sheldon bond over episodes of Sesame Street, a show famous for its educational puppetry and songs. Their unlikely friendship grows through these coviewing sessions. The scenes highlight Sheldon's childlike enthusiasm.
What is the title of the academic competition the group attends at MIT?
Science Slam
Physics Bowl
Quiz Quest
Nerd-Off
In Season 8, Sheldon and co. travel to MIT for the annual Physics Bowl competition, showcasing their competitive spirit. The event allows for character dynamics and humor centered on academic rivalry. Though fictionalized, it mirrors real intercollegiate contests.
Which character holds a PhD in neuroscience?
Bernadette Rostenkowski-Wolowitz
Mary Cooper
Beverly Hofstadter
Amy Farrah Fowler
Amy Farrah Fowler earned her doctorate in neuroscience, specializing in neurobiology before meeting Sheldon. Her academic credentials parallel the other scientists and contribute to her independent research storyline. She later shares a Nobel Prize with Sheldon.
What is the name of Raj's dog that he gets in later seasons?
Pepper
Sugar
Cinnamon
Cocoa
In the series finale, Raj adopts a puppy named Cinnamon after regaining his confidence around women. The name reflects his sweet disposition and complements his character arc. Cinnamon appears in subsequent episodes and merchandise.
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Study Outcomes

  1. Recall Iconic Catchphrases -

    After completing the quiz, readers will be able to accurately recall and match the most memorable lines from The Big Bang Theory, showcasing their grasp of the show's humor.

  2. Identify Character Quirks -

    Readers will understand the unique personalities and signature behaviors of main cast members, enhancing their appreciation of the sitcom's dynamics.

  3. Analyze Fun Facts and Trivia -

    Participants will learn to distinguish between facts and fictional embellishments by diving into big bang theory tv show trivia and behind-the-scenes details.

  4. Apply Trivia in Group Challenges -

    Users can confidently transform big bang theory trivia game questions into engaging activities, encouraging friendly competition among friends.

  5. Evaluate Personal Big Bang Theory Mastery -

    After the quiz, readers will be able to assess their expertise in big bang theory trivia, pinpointing areas of strength and topics for deeper exploration.

Cheat Sheet

  1. "Bazinga!" Catchphrase Origins -

    First coined by Sheldon in Season 2 Episode 23 ("The Monopolar Expedition") and listed on IMDb as his signature quip, "Bazinga!" signals a prank or witty jab. A simple mnemonic - "Big Azinga Zingers Instantaneously Generate Amusement" - helps recall its usage. According to the CBS official site, it appears in over 40 episodes, cementing its place in pop-culture trivia.

  2. Core Scientific Specialties -

    The four main guys cover distinct fields: Sheldon (theoretical physics), Leonard (experimental physics), Raj (astrophysics) and Howard (aerospace engineering). Caltech's department pages confirm these roles, enhancing authenticity. Remember "T.E.A.M." (Theoretical, Experimental, Astrophysics, Mechanical) to quickly match names to disciplines.

  3. Pop-Culture References -

    The show weaves in everything from Star Trek™ (Wesley Crusher cameo) to Marvel™ crossovers; Entertainment Weekly documents over 200 such nods. Spotting these easter eggs boosts your fan cred - try tallying mentions per season as a fun challenge. A handy trick: track one franchise per episode to build a quick reference table.

  4. Episode & Season Breakdown -

    Running for 12 seasons and 279 episodes (per official CBS archives), The Big Bang Theory holds a record for sitcom longevity on network TV. Noting the premiere and finale episode titles can anchor your timeline: "Pilot" (S1E1) and "The Stockholm Syndrome" (S12E24). Create a simple flashcard set grouping seasons by landmark character arcs to study efficiently.

  5. Recurring Gags & Songs -

    "Soft Kitty" appears in 14 episodes as Sheldon's comfort song, documented in the show's official script database. The Friendship Algorithm (S2E6) and Apartment Roommate Agreement are similarly recurring motifs that fans quiz on. Use the rhyme "Soft kitty, warm kitty, little ball of fur" to trigger recall of S2 trivia game questions.

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