Are you ready to test your knowledge of one of television’s most beloved sitcoms? Whether you’re a casual viewer who enjoyed Sheldon’s quirky catchphrases or a dedicated fan who can recite the Roommate Agreement from memory, this comprehensive Big Bang Theory quiz will challenge and entertain you!
From the show’s humble beginnings in 2007 to its emotional finale in 2019, The Big Bang Theory captured audiences with its unique blend of science, pop culture, and heartwarming character development. Over 12 seasons, we laughed and cried with Leonard, Sheldon, Penny, Howard, Raj, Bernadette, and Amy as they navigated life, love, and the occasional complex physics equation.
This quiz is divided into five progressively challenging rounds, starting with easy warm-up questions and culminating in specialized trivia that only the most dedicated fans will master. Each round contains 20 questions that will test various aspects of your Big Bang Theory knowledge—from character catchphrases to scientific references and everything in between.
So grab your favorite spot on the couch (just not Sheldon’s!), prepare a hot beverage, and see if you have what it takes to earn the title of Big Bang Theory Trivia Master!
Round 1: Easy Big Bang Theory Questions
Let’s start with some basics that any fan should know:
- What is Sheldon Cooper’s catchphrase?
Answer: Bazinga! - What is Leonard’s last name?
Answer: Hofstadter - What profession does Penny eventually pursue after giving up acting?
Answer: Pharmaceutical sales representative - What university do the male characters work at?
Answer: Caltech (California Institute of Technology) - What is Howard’s engineering specialty?
Answer: Aerospace engineering - Which character is initially unable to talk to women unless drunk?
Answer: Raj (Rajesh Koothrappali) - What is the name of the comic book store where the guys frequently hang out?
Answer: The Comic Center of Pasadena (or Stuart’s Comic Book Store) - What is Sheldon’s favorite spot in the apartment?
Answer: The left side of the couch - What instrument does Sheldon play?
Answer: Theremin - What is Amy Farrah Fowler’s profession?
Answer: Neuroscientist - What is Bernadette’s maiden name?
Answer: Rostenkowski - What food does Sheldon traditionally eat on Tuesdays?
Answer: Thai food - In which state was Sheldon born and raised?
Answer: Texas - What is the name of Howard’s mother?
Answer: Debbie Wolowitz - Who lives in apartment 4B, across the hall from Leonard and Sheldon?
Answer: Penny - What field did Leonard study in physics?
Answer: Experimental physics - What is the name of Penny’s ex-boyfriend who appears in several episodes?
Answer: Kurt - What is Sheldon’s job title?
Answer: Theoretical physicist - What is the name of Howard and Bernadette’s first child?
Answer: Halley - What game do the guys often play on “Anything Can Happen Thursday”?
Answer: Klingon Boggle
If you got 15 or more correct in this round, you’re off to a great start! Let’s move on to some multiple-choice questions.
For fans of in-depth character exploration, you might enjoy our collection of deep questions to ask a girl to create meaningful connections similar to those we witnessed evolve through The Big Bang Theory’s 12 seasons.
Round 2: Multiple Choice Questions
- Which superhero does Sheldon most frequently dress up as?
a) The Flash
b) Batman
c) Green Lantern
d) The Hulk
Answer: a) The Flash - What is the name of Raj’s dog?
a) Cinnamon
b) Pepper
c) Chanel
d) Cupcake
Answer: a) Cinnamon - Which of these is NOT one of Howard’s nicknames for Bernadette?
a) Bernie
b) Honey Berry
c) Queen Berry
d) Berry
Answer: c) Queen Berry - Which of these is NOT a field Sheldon has a PhD in?
a) Physics
b) Mathematics
c) Chemistry
d) Biology
Answer: d) Biology - What is the formal name of the “relationship agreement” between Amy and Sheldon?
a) The Relationship Protocol
b) The Dating Parameters
c) The Relationship Agreement
d) The Romantic Paradigm
Answer: c) The Relationship Agreement - What is the apartment number for Leonard and Sheldon’s apartment?
a) 3A
b) 4A
c) 5A
d) 2B
Answer: b) 4A - Which of these was NOT a roommate of Sheldon’s before Leonard?
a) Sebastian
b) Dennis Kim
c) Louie/Louise
d) The Crazy Roommate
Answer: b) Dennis Kim - Which university did Howard attend?
a) Caltech
b) Stanford
c) Princeton
d) MIT
Answer: d) MIT - What is Penny’s home state?
a) Iowa
b) Nebraska
c) Kansas
d) Oklahoma
Answer: b) Nebraska - Which of these is NOT a game the guys play?
a) Mystic Warlords of Ka’a
b) Research Lab
c) Dungeons and Dragons
d) Physics Bowl
Answer: b) Research Lab - What is the name of Sheldon’s favorite train?
a) The Jacobite Express
b) The City of Los Angeles
c) The Super Chief
d) The Southwest Chief
Answer: c) The Super Chief - Which physicist does Sheldon admire most?
a) Albert Einstein
b) Richard Feynman
c) Stephen Hawking
d) Neil deGrasse Tyson
Answer: b) Richard Feynman - What is Sheldon’s favorite Star Trek character?
a) Captain Kirk
b) Spock
c) Data
d) Captain Picard
Answer: b) Spock - What was the name of the guidance system Howard designed for the military?
a) M.O.N.T.E.
b) J.A.R.V.I.S.
c) T.A.H.I.T.I.
d) R.A.M.
Answer: a) M.O.N.T.E. - What item did Penny give Leonard that first made Sheldon jealous?
a) A Transporter replica
b) A Nimoy-signed napkin
c) A signed Star Wars poster
d) A Batman costume
Answer: b) A Nimoy-signed napkin - Where do Howard and Bernadette first meet?
a) At work
b) At a bar
c) Through Penny
d) At the Cheesecake Factory
Answer: c) Through Penny - What is Amy’s favorite hot beverage?
a) Chamomile tea
b) Earl Grey tea
c) Hot chocolate
d) Coffee
Answer: a) Chamomile tea - Which of these actors never made a cameo appearance on the show?
a) Stan Lee
b) Neil deGrasse Tyson
c) Matt Damon
d) Carrie Fisher
Answer: c) Matt Damon - What is Sheldon’s IQ?
a) 170
b) 187
c) 196
d) 208
Answer: b) 187 - What is Leonard’s middle name?
a) Leakey
b) Lawrence
c) Louis
d) Lionel
Answer: a) Leakey
How are you doing so far? The questions are getting tougher! Let’s move on to the medium difficulty section.
If you enjoy these character-driven questions, you might also like our collection of hypothetical questions that can spark engaging discussions similar to the theoretical debates our favorite physicists often have!
Round 3: Medium Difficulty Questions
- What is the title of Sheldon and Amy’s paper on super-asymmetry?
Answer: “Super-Asymmetry in Two-Dimensional Space” - What is Bernadette’s field of study?
Answer: Microbiology - Who is “Zazzles”?
Answer: A cat Sheldon wanted to adopt - What is the name of Howard’s astronaut nickname?
Answer: Froot Loops - What does the “S” in Stuart Bloom’s store (S.C.C.P.) stand for?
Answer: Stuart’s - What is the name of Sheldon’s childhood bully?
Answer: Jimmy Speckerman - What song does Sheldon sing to comfort Penny when she’s sick?
Answer: “Soft Kitty” - What is the name of Raj’s selective mutism study?
Answer: “Selective Mutism and its Correlation to Social Anxiety Disorder” - What was the name of the app that Howard, Leonard, and Raj developed?
Answer: Wolowitz Zero-Gravity Waste Disposal System (or the “Space Toilet”) - What is the name of Penny’s failed business venture?
Answer: Penny Blossoms - What was written on the Post-it note that Sheldon stuck to Penny’s broken elevator?
Answer: “Out of order” - What was the name of Leonard and Sheldon’s app?
Answer: Roommate Agreement app - What is the name of the song Howard wrote for Bernadette?
Answer: “If I Didn’t Have You (Bernadette’s Song)” - What was the name of the gorilla that Amy worked with?
Answer: Ricky - What color is Sheldon’s toothbrush?
Answer: Blue - What is the name of Penny’s online game character?
Answer: Queen Penelope - What is Raj’s sister’s name who dates Leonard?
Answer: Priya - What was Sheldon dressed as when he met James Earl Jones?
Answer: Darth Vader - What is the name of the janitor at the university who befriends Sheldon?
Answer: Octavio - What is the exact number of stairs to the guys’ apartment?
Answer: 87
Getting tougher now, isn’t it? Let’s push your Big Bang Theory knowledge even further!
If you enjoy the intellectual challenges of this quiz, check out our collection of philosophical questions that would make even Sheldon Cooper pause and think!
Round 4: Hard Big Bang Theory Trivia
- What is Sheldon’s full catchphrase when knocking on doors?
Answer: knock knock knock “Penny” (or person’s name) repeated three times - What is the address of the apartment building?
Answer: 2311 North Los Robles Avenue, Pasadena, California - What is the equation written on Leonard’s whiteboard in the pilot episode?
Answer: The Diffusion Coefficient for Stellar Dynamics - What are the full names of Howard and Bernadette’s children?
Answer: Halley Rostenkowski-Wolowitz and Neil Michael Rostenkowski-Wolowitz - What is Sheldon’s favorite number?
Answer: 73 - What is the title of Raj’s paper that got him in People magazine?
Answer: “Outer Space: Infinite Frontier or Intergalactic Garbage Dump?” - What was Sheldon’s nickname in high school?
Answer: Smelly Pooper - What is the four-note sequence that Sheldon uses as his security code?
Answer: B-B-F-A-F (the opening notes to the Superman theme) - What was the exact date that Leonard and Sheldon met?
Answer: April 18, 2003 - What is Penny’s maiden name?
Answer: It’s never revealed in the series - What are the exact terms of the “Friendship Rider” in the Roommate Agreement?
Answer: “All disputes shall be resolved via Rochambeau” (Rock, Paper, Scissors) - What is the name of Sheldon’s barber?
Answer: Mr. D’Onofrio - In which episode does Sheldon first say “Bazinga”?
Answer: Season 2, Episode 23: “The Monopolar Expedition” - What is the specific reason Sheldon gives for knocking three times?
Answer: “The first one is traditional, the second one is for people who might not have heard the first one, and the third one is for people who might have heard the first two but aren’t sure if it’s for them” - What is the name of the physics conference where Sheldon and Amy first kiss?
Answer: The prom-themed party at the apartment (technically not a physics conference) - What is Howard’s blood type?
Answer: AB negative - What is the exact weight of the made-up element “Copernicium” according to Sheldon?
Answer: 285 - What is the model number of Sheldon’s favorite train?
Answer: Santa Fe Super Chief Number 9904 - What does the acronym S.P.E.C.K.S. stand for in the show?
Answer: Sheldon’s Practically Effective Cleaning and Keeping System - What is the alien species that Stuart dressed up as that impressed Sheldon?
Answer: Breen
Wow, you’ve made it to the final round! This one’s for the true Big Bang Theory experts only.
If you enjoyed the challenging trivia in this round, you might also be interested in our general knowledge trivia collection to further test your intellectual prowess!
Round 5: Expert Level – Quotes and References
For this specialized round, you’ll need to identify which character said each of these quotes or which episode the reference is from:
- “I’m not crazy. My mother had me tested.”
Answer: Sheldon Cooper - “It’s a lot of what-if. What if I had taken that job at that restaurant in Europe?”
Answer: Penny - “Sometimes you just have to bow to the absurd.”
Answer: Leonard Hofstadter - “I’ve got a lab full of primate carcasses and you don’t hear me bitching.”
Answer: Amy Farrah Fowler - “I’m the small package good things come in!”
Answer: Bernadette Rostenkowski - “I think that you have as much of a chance of having a sexual relationship with Penny as the Hubble telescope does of discovering that at the center of every black hole is a little man with a flashlight searching for a circuit breaker.”
Answer: Sheldon Cooper - “Sheldon, face it, I’m the best girlfriend you’re ever going to have.”
Answer: Amy Farrah Fowler - “The mummy returns! Get it? Because you were all wrapped up…”
Answer: Howard Wolowitz - “My mother’s been saying it for years—I’m never going to find a woman unless I become a doctor, buy a condo, and join a Hindu dating service.”
Answer: Rajesh Koothrappali - “I believe in a lot of things. I believe that Newton was right about gravity, I believe that Darwin was right about evolution, and I believe that Sheldon is wrong about Batman/Superman.”
Answer: Leonard Hofstadter - “Once again, Sheldon’s insistence on adherence to ritual has resulted in bodily harm.”
Answer: Leonard Hofstadter - “You know, I was going to make you French toast, but I’m out of eggs, syrup, and bread. So it’s a good thing you had that granola bar.”
Answer: Penny - “I had a great time last night. Usually on Valentine’s Day, I’m sad and alone, or sad and with Leonard.”
Answer: Penny - “I don’t need sleep. I have a machine that simulates the feeling of being slapped in the face with a cold, wet fish.”
Answer: Sheldon Cooper - “I am not going to say another word until people stop celebrating old things.”
Answer: Sheldon Cooper - “Please don’t take him to a helicopter. He’ll be recognized and asked to leave.”
Answer: Amy Farrah Fowler (about Sheldon) - “I had to leave Benihana. Those chefs are too flashy and everyone on that table was enjoying it too much.”
Answer: Sheldon Cooper - “Sheldon, you’re on my spot.”
Answer: Leonard Hofstadter - “I’m a Texan, my papa taught me to shoot before he taught me to walk.”
Answer: Sheldon Cooper - “No, I didn’t make a mistake. I know the Nobel Prize isn’t given posthumously. That’s why I said ‘if he’s dead.’ Pay attention, Penny!”
Answer: Sheldon Cooper
How Did You Score?
0-20 correct: Penny’s Level – You’ve watched a few episodes but might need a Big Bang Theory marathon!
21-40 correct: Howard Level – You’re familiar with the show but still have more to learn.
41-60 correct: Leonard Level – You know the show well and could hold your own in any Big Bang Theory conversation.
61-80 correct: Amy Level – Impressive! You’re definitely a serious fan with deep knowledge of the series.
81-100 correct: Sheldon Level – Bazinga! You’re a true Big Bang Theory expert. Sheldon would be (reluctantly) impressed.
How many did you get right? Share your score in the comments and challenge your friends to beat it! Did any of our questions surprise you or teach you something new about the show?
If you enjoyed testing your knowledge with this quiz, you might also be interested in our television trivia collection featuring questions about other popular TV shows!