10 most difficult inventors riddles A list of inventors related questions that are most often answered incorrectly Technology quiz Who made the first violin?Andrea Amati. The oldest documented violin to have four strings, like the modern violin, is supposed to have been constructed in 1555 by Andrea Amati. Earlier instuments only had three strings and were called violetta. The violin immediately became very popular, both among street musicians and the nobility.very hard 26% Antonio StradivariAntonio Stradivari36%Andrea AmatiAndrea Amati26%Giovanni Paolo MagginiGiovanni Paolo Maggini17%Leonardo da VinciLeonardo da Vinci19%Created by: globalquiz.org. Statistics based on 3943 answers in 5 languages »classical music riddles » Who invented the first vacuum tube?John Fleming. In 1904, he invented the two-electrode vacuum-tube rectifier, which he called the oscillation valve. This invention is often considered to have been the beginning of electronics. Fleming's diode was used in radio receivers and radars for many decades afterwards, until it was superseded by solid state electronic technology more than 50 years later.very hard 28% Lee de ForestLee de Forest13%Ferdinand BraunFerdinand Braun25%John FlemingJohn Fleming28%Vladimir ZworykinVladimir Zworykin32%Created by: Ninjai. Statistics based on 52 answers in 3 languages »technology riddles » Who discovered the process of vulcanization?Charles Goodyear for many years improved the method of hardening the rubber. When he succeeded in 1839, investors were already offended by earlier failures. Charles died in misery. The Goodyear company was named in his honor, but otherwise is not related to him.very hard 30% Charles GoodyearCharles Goodyear30%John Boyd DunlopJohn Boyd Dunlop25%Edouard MichelinEdouard Michelin30%Giovanni Battista PirelliGiovanni Battista Pirelli13%Created by: GabrielBaran. Statistics based on 12884 answers in 3 languages »tires riddles » What was the main weakness of Colt revolvers, comparing to its competitors?Lack of possibility to use metallic cartridges. Samuel Colt missed a great opportunity in firearms development when he dismissed an idea from one of his gunsmiths, Rollin White. White proposed a "bored-through" revolver cylinder to allow the use of metallic cartridges in a handgun. After Colt fired White for suggesting an improvement to his revolver, White took his idea to Colt's competitor, Smith & Wesson, who patented his invention and kept Colt from being able to build cartridge firearms for almost 20 years.very hard 31% low speedlow speed28%low durabilitylow durability11%lack of possibility to use metallic cartridgeslack of possibility to use metallic cartridges31%poor shooting precisionpoor shooting precision28%Created by: globalquiz.org. Statistics based on 9589 answers in 4 languages »pistols riddles » Who invented spectroscope?Joseph van Fraunhofer. Joseph Ritter von Fraunhofer was a Bavarian physicist and optical lens manufacturer. He made optical glass and achromatic telescope objective lenses, invented the spectroscope, and developed diffraction grating. very hard 31% Issac NewtonIssac Newton18%William HerschelWilliam Herschel23%Joseph van FraunhoferJoseph van Fraunhofer31%Edwin HubbleEdwin Hubble27%Created by: Ninjai. Statistics based on 6165 answers in 3 languages »inventions riddles » Who invented the mercury-in-glass thermometer?Gabriel Daniel Fahrenheit. Daniel Gabriel Fahrenheit was a German physicist, engineer, and glass blower who is best known for inventing the mercury-in-glass thermometer (1714), and for developing a temperature scale now named after him very hard 34% Galileo GalileiGalileo Galilei22%Anders CelsiusAnders Celsius28%Gabriel Daniel FahrenheitGabriel Daniel Fahrenheit34%William KelvinWilliam Kelvin13%Created by: Paweł Kołodziejczyk. Statistics based on 7745 answers in 5 languages »discoverers riddles » Where and when did Leonardo die?May 2, 1519 in Amboise (France). In 1516, Leonardo entered the service of king Francis I of France, being given the use of the manor house Clos Lucé near the king's residence at the royal Château d'Amboise. He spent the last three years of his life here. He died on 2 May 1519 and was buried in the Chapel of Saint-Hubert in Château d'Amboise in France. very hard 34% May 2, 1519 in VeniceMay 2, 1519 in Venice17%May 5, 1514 in FlorenceMay 5, 1514 in Florence40%May 2, 1519 in Amboise (France)May 2, 1519 in Amboise (France)34%May 5, 1514 in RomeMay 5, 1514 in Rome8%Created by: Tschuka. Statistics based on 2062 answers in 2 languages »Leonardo da Vinci riddles » Who Discovered Magnetic Field? Hans Christian Oersted. Danish physicist and chemist Hans Christian Oersted (1777-1851) discovers in 1820 that electric current affects a compass needle and create magnetic fields. He was the first scientist to find the connection between electricity and magnetism. He is remembered today for Oersted's Law. very hard 34% André-Marie Ampère André-Marie Ampère 13%Alessandro VoltaAlessandro Volta17%Hans Christian OerstedHans Christian Oersted34%Michael Faraday Michael Faraday 34%Created by: Tschuka. Statistics based on 337 answers in 2 languages »Denmark riddles » Who created Scrabble?Alfred Butts . In 1938, American architect Alfred Mosher Butts created the game as a variation on an earlier word game he invented called Lexiko. In 1948, James Brunot bought the rights to manufacture the game in exchange for granting Butts a royalty on every unit sold. There are around 4,000 Scrabble clubs around the world .very hard 37% Damien MonnierDamien Monnier16%James BrunotJames Brunot27%Alfred Butts Alfred Butts 37%Edgar Allan PoeEdgar Allan Poe19%Created by: Tschuka. Statistics based on 307 answers in 2 languages »America riddles » Who created the QWERTY keyboard layout?Christopher Latham Sholes. QWERTY - a symbolic Latin alphabetical name for typewriters and computers, taken from the first six letters in a row below the row of digits, viewed from the left. The first typewriters used an alphabetical key setting. However, with the fast typing of the neighborhood of frequently used keys caused mutual jamming of the arms with the fonts. In 1878, the first typewriter with a QWERTY keyboard was patented. The creator of the QWERTY layout was American journalist and inventor Christopher Latham Sholes.very hard 37% Christopher Latham SholesChristopher Latham Sholes37%Jan SzczepanikJan Szczepanik29%Thomas Alva EdisonThomas Alva Edison17%Dag HammarskjöldDag Hammarskjöld15%Created by: Katarzyna Dąbrowska. Statistics based on 2640 answers in 3 languages »history of technics riddles » Play technology quiz and see all the questions.