The Rubik's Cube is a 3D combination puzzle invented in 1974 by Hungarian sculptor and professor of architecture Ernő Rubik. Originally called the Magic Cube, the puzzle was licensed by Rubik to be sold by Pentangle Puzzles in the UK in 1978, and then by Ideal Toy Corp in 1980 via businessman Tibor Laczi and Seven Towns founder Tom Kremer. The cube was released internationally in 1980 and became one of the most recognized icons in popular culture. It won the 1980 German Game of the Year special award for Best Puzzle. As of January 2024, around 500 million cubes had been sold worldwide, making it the world's bestselling puzzle game and bestselling toy. The Rubik's Cube was inducted into the US National Toy Hall of Fame in 2014.
Matthew Charles Mullenweg is an American web developer and entrepreneur. He is known as a co-founder of the free and open-source web publishing software WordPress, and the founder of Automattic.
The World Puzzle Championship is an annual international puzzle competition run by the World Puzzle Federation. All the puzzles in the competition are pure-logic problems based on simple principles, designed to be playable regardless of language or culture.
Sean Parker is an American entrepreneur and philanthropist, most notable for co-founding the file-sharing computer service Napster, and was the first president of the social networking website Facebook. He also co-founded Plaxo, Causes, Airtime.com, and Brigade, an online platform for civic engagement. He is the founder and chairman of the Parker Foundation, which focuses on life sciences, global public health, and civic engagement. On the Forbes 2022 list of the world's billionaires, he was ranked No. 1,096 with a net worth of US$2.8 billion.
Jason McCabe Calacanis is a podcaster, American Internet entrepreneur, angel investor, and author.
Sideways Arithmetic From Wayside School is a children's novel by Louis Sachar in the Wayside School series. The book contains mathematical and logic puzzles for the reader to solve, presented as what The New Yorker called "absurdist math problems." The problems are interspersed with characteristically quirky stories about the students at Wayside School.
Shazam is an application that can identify music based on a short sample played using the microphone on the device. It was created by the British company Shazam Entertainment, based in London, and has been owned by Apple since 2018. The software is available for Android, macOS, iOS, Wear OS, watchOS and as a Google Chrome extension.
Indiegogo is an American crowdfunding website founded in 2008 by Danae Ringelmann, Slava Rubin, and Eric Schell. Its headquarters are in San Francisco, California. The site is one of the first sites to offer crowd funding. Indiegogo allows people to solicit funds for an idea, charity, or start-up business. Indiegogo charges a 5% fee on contributions. This charge is in addition to Stripe credit card processing charges of 2,9% + $0.30 per transaction. Fifteen million people visit the site each month.
Edmodo was an educational technology platform for K–12 schools and teachers. Launched in 2008, it enabled teachers to share content, distribute quizzes and assignments, and manage communication with students, colleagues, and parents. The service was shut down on September 22, 2022.
ABCmouse.com is a digital education program for children ages 2–8, created by the edtech company Age of Learning, Inc. The program offers educational games, videos, puzzles, printables, and a library of regular and “read-aloud” children’s books, covering subjects including reading and language arts, math, science, health, social studies, music, and art.
Snapchat is an American multimedia instant messaging app and service developed by Snap Inc., originally Snapchat Inc. One of the principal features of the multimedia Snapchat is that pictures and messages are usually available for only a short time before they become inaccessible to their recipients. The app has evolved from originally focusing on person-to-person photo sharing to presently featuring users' "Stories" of 24 hours of chronological content, along with "Discover", letting brands show ad-supported short-form content. It also allows users to store photos in a password-protected area called "My Eyes Only". It has also reportedly incorporated limited use of end-to-end encryption, with plans to broaden its use in the future.
Chamath Palihapitiya is a Sri Lankan-born Canadian and American venture capitalist, engineer, SPAC sponsor, and the founder and CEO of Social Capital. Palihapitiya was an early senior executive at Facebook, working at the company from 2007 to 2011. Following his departure from Facebook, Palihapitiya started The Social+Capital Partnership, through which he invested in several companies, including Yammer and Slack. He is also the co-host of technology podcast All-In, along with David Sacks, Jason Calacanis, and David Friedberg.
Cicada 3301 is the name given to three sets of puzzles posted under the name "3301" online between 2012 and 2014. The first puzzle started on January 4, 2012, on 4chan and ran for nearly a month. A second round of puzzles began one year later on January 4, 2013, and then a third round following the confirmation of a fresh clue posted on Twitter on January 4, 2014. The third puzzle remains unsolved. The stated intent was to recruit "intelligent individuals" by presenting a series of puzzles to be solved; no new puzzles were published on January 4, 2015. A new clue was posted on Twitter on January 5, 2016. Cicada 3301 posted their last verified OpenPGP-signed message in April 2017, denying the validity of any unsigned puzzle.
Social Capital, formerly known as Social+Capital Partnership, is a venture capital firm based in Palo Alto, California. The firm specializes in technology startups, providing seed funding, venture capital, and private equity.
Futility Closet is a blog, podcast, and database started in 2005 by editorial manager and publishing journalist Greg Ross. As of February 2021 the database totaled over 11,000 items. They range over the fields of history, literature, language, art, philosophy, and recreational mathematics.
Sue Khim is an American education entrepreneur. She is the co-founder and current CEO of Brilliant.org, an educational platform and online community that features problems and courses in mathematics, physics, quantitative finance, and computer science. She also co-founded edtech start-up Alltuition, which helped students find low-cost college loans and assisted with financial aid forms. In 2012, she was named one of Forbes' 30 Under 30 in education.
Hustle is an American company that provides a peer-to-peer text messaging platform for areas such as politics, higher education, and non-profits. The platform initiates personal conversation between organizations and their targeted supporters or clients. Hustle was founded in December 2014, by Perry Rosenstein, Roddy Lindsay, and Tyler Brock.
Gary Antonick is an American journalist and recreational mathematician who for many years wrote a puzzle-based column called "Numberplay" for the New York Times.
Arjun Sethi is an American internet entrepreneur, investor and executive. He is co-founder and partner at venture capital firm Tribe Capital. Previously, he was a partner at Social Capital and an executive at Yahoo!, where he launched Yahoo! Livetext. Prior, he was co-founder and CEO of MessageMe and was the CEO of Lolapps, the developer behind Ravenwood Fair. In December 2023, he became Tribe Capital's chairman and CIO.
Clover Health Investments, Corp. is an American health care company founded in 2014. The company provides Medicare Advantage (MA) insurance plans and operates as a direct contracting entity with the U.S. government. The company manages care for Medicare beneficiaries in 11 states and started trading publicly on January 8, 2021.
