Here you can find lots of fun math facts you can share with your friends or class... Quess the number. Magic number. Multiplying in an easy way. Roman, Greek, Egiptian Numerals. Prime Numbers. Large Numbers. Calculate the day. How old are you exactly?

Ask someone to add all the numbers from 1 to 200 and then surprise them by giving them the result in less than one minute. How?

The sum of the first and last, second and second last numbers and so on are always the same. Meaning, 1+200, 2+199, 3+198 is always 201. In total we have 100 sums like this so 201*100 = 20 100.

Of course, you can also ask for the sum of numbers from 1 to 100 or 101 to 300.

Number 11 and any double-digit number can be multiplied in a shorter and quicker way. **Free PDF here!**

A formula that can help us calculate what day any date was. **Free PDF here!**

Here you can find the chart of Roman, Greek and Egiptian numerals.

Roman numerals are a system of numerical notations used by the old Romans. Greek numerals are a bit more complicated than Roman. These Acrophonic Greek numerals were used in ancient Greece up to Roman times (100 BC). The system of ancient Egyptian numerals was used in Ancient Egypt around 3000 BC until the early first millennium AD, and written in hieroglyphs. **Free PDF here!**

Here you can find the first 500 prime numbers. **Free PDF here!**

Some interesting results of multiplication. **Free PDF here!**

The remainder that we get when we divide the number 2519 with numbers from 1 to 10. **Free PDF here!**

Probably the most popular number in human history. The Pi Number is usually written as 3.14, but in reality it has an infinite number of decimal places. The simplest way to describe the Pi Number is that is a number which gives us the ratio of the circle’s circumference and its diameter. There were many attempts throughout history to get the Pi Number to as many decimals as possible – and here is the Pi Number calculated to 115 decimal places:

3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510 58209 74944 59230 78164 06286 20899 86280 34825 34211 70679 82148 08651 32823...

Calculate how many years, months, weeks, days, hours, minutes old you are - **Here!**

Read, calculate, turn over and try again. It is the same, isn't it? **Free PDF here!**