1, 11, 21, 1211, 111221. These are the first five elements of a number sequence. Can you figure out what comes next? If you're trying a bunch of arithmetic operations to make the numbers work, you're ...

Take a look at Champernowne’s Constant. It’s a ridiculously easy sequence to make, and yet it fooled programs designed to root out underlying order in seemingly random numbers. David Gawen ...

After dividing 1 by 999-quattuordecillion (a number that’s 48 integers long), you get the Fibonacci sequence presented in neat, 24-digit strings. Here’s why that happens. As a quick refresher, the ...

Leonardo of Pisa, known as Fibonacci, introduced Hindu-Arabic numerals to Europe in 1202. His famous number sequence began as a simple rabbit puzzle. Centuries later, this sequence gained fame for its ...

11:24, Wed, Dec 17, 2025 Updated: 11:24, Wed, Dec 17, 2025 A tricky number puzzle has left thousands of people scratching their heads online, with experts claiming that only a genius can figure out ...

Optical illusion puzzles are one of the biggest trends because these seemingly simple puzzles combine entertainment and real cognitive skills. These puzzles are designed in such a way that they ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...