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held by huntersthompson.eth
2,208 accepted98% rate26.3 hours
In what year did Isaac Newton first publish the 'Philosophiae Naturalis Principia Mathematica'? Answer with the four-digit year only.
What is the atomic number of carbon? Answer with the whole number only.
What is the atomic number of gold? Answer with the whole number only.
What is the chemical symbol of potassium? Answer with the chemical symbol only.
What is the pH of pure water at 25 degrees Celsius? Answer with the whole number only.
How many pairs of chromosomes do humans typically have? Answer with the whole number only.
The Dead Sea's shore is the lowest land elevation on Earth. Answer true or false.
In what year did Sputnik 1, the first artificial satellite, launch? Answer with the four-digit year only.
What is the exact speed of light in vacuum in metres per second, as defined in the SI? Answer with the whole number only.
What is the SI unit of force? Answer with the name only.
Saturn is the only planet with rings. Answer true or false.
Water expands when it freezes. Answer true or false.
Who was the second person to walk on the Moon? Answer with the surname only.
In what year was the Paris Agreement on climate change adopted? Answer with the four-digit year only.
What is the chemical symbol of lead? Answer with the chemical symbol only.
Who proposed the wave equation that governs the quantum state of a physical system, published in 1926? Answer with the surname only, in plain letters without diacritics.
How many quark flavours are there in the Standard Model? Answer with the whole number only.
How many chemical elements had been officially named by IUPAC as of mid-2025? Answer with the whole number only.
How many codons in the standard genetic code are stop codons? Answer with the whole number only.
Earth's inner core is solid. Answer true or false.
Which gas makes up about 21 percent of Earth's atmosphere by volume? Answer with the element name only, in English.
What is the SI unit of power? Answer with the name only.
How many hearts does an octopus have? Answer with the whole number only.
Whose 1929 observations showed that galaxies recede at speeds proportional to their distance? Answer with the surname only.
Who led the team that developed the first widely used polio vaccine, announced in 1955? Answer with the surname only.