Question 1

True or false: Eratosthenes was nicknamed 'Beta' because he was the second-best scholar in every field.

Accepted Answer

False. He was called 'Beta' by jealous rivals, implying he was second-rate in everything, but he was actually a top polymath.

Question 2

True or false: Eratosthenes served as the chief librarian of the Library of Alexandria.

Accepted Answer

True. He was the third head librarian at Alexandria, succeeding Apollonius of Rhodes, and was a polymath in math, astronomy, and poetry.

Question 3

True or false: Eratosthenes only used a well, a stick, and a camel to calculate Earth's circumference.

Accepted Answer

True. He measured shadows at noon in two cities, used the distance a camel caravan traveled, and simple geometry—no modern tech needed.

Question 4

True or false: Eratosthenes discovered the sieve method for finding prime numbers while studying music theory.

Accepted Answer

False. The Sieve of Eratosthenes was developed for number theory, not music. He was also a music theorist, but the sieve is pure math.

Question 5

True or false: Eratosthenes was the first person to propose that the Earth is round.

Accepted Answer

False. Greek philosophers like Pythagoras and Aristotle argued for a spherical Earth centuries before Eratosthenes was born.

Question 6

True or false: Eratosthenes invented the concept of latitude and longitude lines on maps.

Accepted Answer

True. He created an early world map with a grid of parallels and meridians, pioneering systematic cartography.

Question 7

True or false: Eratosthenes calculated Earth's circumference to within about 1% of the modern value.

Accepted Answer

False. His estimate was remarkably close but off by about 10–15% depending on the stadia unit used; still impressive for 240 BCE.

Question 8

True or false: Eratosthenes correctly calculated the tilt of Earth's axis using only a sundial.

Accepted Answer

True. By measuring the noon shadow length at the summer solstice, he determined the axial tilt to about 23.5 degrees.

Eratosthenes Trivia Questions