Math & Numbers Facts for Kids
Mind-bending number facts
A googolplex is 10 to the power of a googol β a 1 followed by a googol zeros. This number is so large that writing it out would require more space than exists in the observable universe.
Multiplication is just a shortcut for repeated addition. 4 Γ 3 means 4 added three times: 4 + 4 + 4 = 12. Understanding this connection makes it much easier to understand why multiplication works the way it does.
The number line stretches to infinity in both directions. Between any two numbers β no matter how close together β there are infinitely many other numbers. Even between 0 and 1, there are infinite fractions and decimals.
Ada Lovelace, a 19th-century mathematician, wrote what is considered the first computer program β more than a century before modern computers were built. She worked with Charles Babbage on his proposed mechanical computing machine.
Fractions that look different can be equal in value. 3/6, 4/8, 50/100 all equal 1/2. These are called equivalent fractions β a key idea in math that helps us compare and add fractions easily.
The Collatz conjecture has a simple rule: take any number, if even divide by 2, if odd multiply by 3 and add 1, and repeat. Every number tested always eventually reaches 1, but no mathematician has ever proven this must always be true.
Ancient Babylonians used a base-60 number system. This is why we still have 60 seconds in a minute, 60 minutes in an hour, and 360 degrees in a circle β all inherited from Babylonian mathematics.
An angle bisector is a line that cuts an angle exactly in half. Angle bisectors are used in construction, design, and optics β whenever you want to split a direction or angle perfectly equally.
In 1736, Euler solved the famous Seven Bridges of KΓΆnigsberg puzzle by proving it was impossible to cross all seven bridges exactly once. In doing so, he invented a whole new branch of mathematics called graph theory.
Every whole number greater than 1 can be broken down into a unique product of prime numbers. For example, 60 = 2 Γ 2 Γ 3 Γ 5. These prime factors are like the building blocks β or atoms β of every number.