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Do you have a mathematician in your life? Chances are, they’re a big fan of the number Pi. Celebrate Pi Day with them on 14 March!

It’s time to be irrational and celebrate π (Pi) Day! Will you slice up this quiz and get 5/5 or are you going to eat humble pie?

Written by Gabrielle Tramby and Rachel Fitzgerald In this activity, you’ll turn a number into a necklace.

1. Pi (or π) is a number that helps describe circles. It links the width of a circle with its perimeter, or the radius of a circle with its area, or the width of a ball and its volume. It’s the same number no matter how big your circle is – about 3.14159265.