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# Interesting math facts for kids

Math teachers can stimulate their pupils by telling them fascinating math facts. Interesting facts are a great way to bridge the gap between the classroom and the real world. Mathematics is how we measure the world we live in. Give your students plenty of interesting math facts so they will be inspired to tell them to their family and friends.

## Big Numbers

Children like the idea of big numbers, even if the numbers are difficult to imagine. Most kids know about million, billion and trillion, but you can add some zeros to get quadrillion, quintillion, sextillion, septillion, octillion and nonillion. These numbers are mostly just fun for students to ponder without much practical application to real life, except for maybe sciences and government debts.

## History

Go over the creation of mathematics in the ancient world by the ancient Egyptians. The Egyptians started using mathematics in 3,000 B.C. They used algebra, geometry and arithmetic from the earliest records. There were many mathematical concepts that we take for granted that the Egyptians knew nothing about, such as the concept of the number zero. For most of history, math equations were written out with words. Most of the math symbols we use today were first accepted by the math world in the 1,500s.

## Pi

Pi is a mathematical constant whose value is the ratio of a circle's circumference to its diameter. What is fascinating about the number is that it is irrational and so it can never be expressed as a fraction. As a decimal, its number never repeats and never seems to end. Written to the fiftieth decimal, pi is 3.14159265358979323846264338327950288419716939937510.

## Golden Ratio

The Golden Ratio is nature's most unique ratio, or relationship between parts. Also known as "Phi" or "the divine proportion," the number associated with this ratio is 1.618. The ancient Greeks used this ratio in their art and architecture. The Golden Ratio shows up in almost anything you can measure, from the perfect spirals in galaxies and seashells to various body parts in the human body. For example, phi is found in the ratio of the length of every human's forearm to hand. Phi proportions are even used in cosmetic surgery to create beautiful faces.

## Common Birthday

In a room with only 23 people, there is a 50 per cent chance that two people share the same birthday. You can try this experiment in your math class by asking students to write down their birthdays and then comparing them together. Children will likely want to try this experiment in their other classes and with their family and friends.