Math You Forgot
The sum of the interior angles of a pentagon.
What is 540°?
The lightest element on the periodic table.
What is hydrogen?
Despite Sydney being the most famous city, this is Australia's actual capital.
What is Canberra?
The largest animal on Earth, this marine mammal can weigh up to 200 tons.
What is a Blue Whale?
This planet has the longest day of any in the solar system — one rotation takes about 243 Earth days, longer than its own year.
What is Venus?
The mathematical constant approximately equal to 2.718, base of the natural logarithm.
What is e?
The element with the symbol Au, prized throughout history.
What is gold?
This tiny nation's capital is Vaduz.
What is Liechtenstein?
This eight-armed cephalopod is known for its incredible intelligence and ability to change color and texture instantly.
What is an Octopus?
This planet has 95 known moons as of 2023, more than any other planet in the solar system, dethroning Jupiter for the top spot.
What is Saturn?
A number is divisible by this if the sum of its digits is divisible by 9.
What is 9?
Named after the Americas, this element has atomic number 95.
What is americium?
Many think this is Canada's largest city, but it's actually the capital.
What is Ottawa?
This slow-moving fish, also called a sunfish, is the heaviest bony fish in the world and can weigh over 5,000 pounds.
What is a Mola Mola?
This ice giant rotates on its side with an axial tilt of 98 degrees, essentially rolling around the sun like a bowling ball.
What is Uranus?
The term for a prime number that remains prime when its digits are reversed — like 13 and 31
What is a emirp?
This noble gas makes signs glow red-orange when electrified.
What is neon?
The capital of Brazil, built from scratch in the late 1950s.
What is Brasília?
This bioluminescent deep-sea shark, found at depths of up to 1,800 feet, glows in the dark and has a retractable jaw.
What is a Cookie Cutter Shark?
This is the name of Neptune's largest moon, which orbits the planet in a retrograde direction and is predicted to break apart into a ring system in approximately 3.6 billion years.
What is Triton?
This famous unsolved conjecture states that every even integer greater than 2 can be expressed as the sum of two primes.
What is Goldbach's Conjecture?
The most abundant element by mass in the Earth's crust.
What is oxygen?
This Central Asian country's capital was renamed Nur-Sultan in 2019, then changed back to Almaty... wait — it's actually this city.
What is Astana?
This tiny, nearly transparent crustacean, found in Antarctic waters, forms the base of almost the entire Southern Ocean food chain.
What is Antarctic Krill?
This is the name of the theoretical region of space beyond Neptune, between 40 and 50 AU from the sun, where Pluto resides along with thousands of other icy bodies, and from which most short-period comets originate.
What is the Kuiper Belt?