Which calculator company famously rebranded in 1985 with a logo based on the mathematical constant π (pi), incorporating the symbol into their product design and marketing?

How well do you know the intersection of mathematics and product branding? This trivia tests your knowledge about how mathematical tools and concepts have been incorporated into famous brand transformations. Many companies have leveraged mathematical principles to redesign their products, optimize their visual identity, or reinvent their brand positioning. Test your knowledge about these mathematical makeovers that changed company trajectories and created iconic brand identities.

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Casio, with their 'π-oneer' campaign featuring the tagline 'Calculate Beyond Limits'
Texas Instruments, with their 'π Vision' redesign that included the symbol in their graphing calculator interface
HP (Hewlett-Packard), with their 'π Precision' campaign that featured the infinite decimal expansion in advertisements
Sharp, with their 'π Perfect' rebranding that integrated the mathematical symbol into their corporate identity