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The Public's Radio

On 9/16/25, celebrate a date of mathematical beauty

Pi Day (3/14) often comes with sweet treats; Square Root Day (4/4/16 or 5/5/25, for example) has a certain numerical rhyme.
Make Tech Easier

Struggling With Math? Your iPhone Might Have the Answer

Learn how to enable the Scientific Calculator and use Math Notes on your iPhone, and breeze through Math equations with ease.