Square root days happen only a few times in a century, and the man who brought the day fame is celebrating his sixth one.

This May marks the only time a calendar has a Square Root Day in a 20-year span, with the last one being on April 4, 2016.

This May marks the only time a calendar has a Square Root Day in a 20-year span, with the last one being on April 4, 2016.

Square Root Day was founded by Ron Gordon, a teacher in Redwood City. He keeps this website up about the special day. Gordon suggests it's a good day to get things squared away, or go square dancing.

A new DNA computer calculates square roots of perfect squares up to 900. Like quantum computers, DNA computers are a frontier of post-silicon computing.

Memorising key square roots and using mental math tricks saves time. Techniques like the nearby perfect square trick and weighted averaging enhance problem-solving skills.

Memorising key square roots and using mental math tricks saves time. Techniques like the nearby perfect square trick and weighted averaging enhance problem-solving skills.