Math
The product of any number and zero is always this.
Zero
Water freezes at 0°C. In which phase is it at -5°C?
Solid
This classic novel never actually specifies the creature’s name, though many people think it does.
Frankenstein (the creature is unnamed)
This ancient civilization was once known as the “land of a million palm trees”.
Dilmun
This famous structure was once considered a failure because people thought it was “too ugly” and demanded it be torn down.
The Eiffel Tower
What is the next number in the sequence: 2, 3, 5, 7, 11,...?
19 (Multiply the differences)
This woman pioneered research on radioactivity and won two Nobel Prizes.
Marie Curie
The main character in The Adventures of Huckleberry Finn.
Huck Finn
This ancient Indian empire minted punch-marked coins that are among the earliest known in the subcontinent.
The Maurya Empire
This food item can be legally sold in many countries even if it contains zero of the ingredient it’s named after.
Vanilla Essence
If you multiply me by any number, the sum of the digits of the product will always equal me or a multiple of me. What number am I?
3 or 9
Lightning is hotter than the surface of this star.
Sun
The author with the pseudonym "Robert Galbraith"
JK Rowling
Bahrain was once ruled by this empire, whose records describe it as a major center for copper trading, even though Bahrain itself had no copper mines.
The Mesopotamian (Sumerian/Akkadian) Empire
This country has a national anthem with no official words, making it technically impossible to sing incorrectly.
Spain (La Marcha Real)
I am a three-digit number. My tens digit is five more than my ones digit, and my hundreds digit is eight less than my tens digit. What number am I?
194
This physicist explained the photoelectric effect and won the 1921 Nobel Prize.
Albert Einstein
The Russian author of Crime and Punishment.
Fyodor Dostoevsky
This ancient university, older than Oxford and often described as the world’s first residential university, attracted students from Greece, China, and Persia. But burned for months when destroyed.
Nalanda University
This animal is the only one besides humans that can naturally read human pointing gestures without training
Dolphins
I am a number. When you multiply me by 3/4, then add 7, the result is 16. What number am I?
12
Known as the “father of modern chemistry,” he formulated the law of conservation of mass.
Antoine Lavoisier
This book imagines firemen whose mission is to burn, not save. The number in the title is often mistaken for a year, though it actually refers to something physical, not historical.
Fahrenheit 451 (451°F is the temperature at which paper ignites)
Before oil was discovered in 1932, Bahrain’s main global export wasn’t pearls, but this lesser-known product essential to sailors.
Date palm ropes
This everyday object existed before the invention of the wheel, writing, and even agriculture, yet we still use it in almost the same form today.
A needle