Show off your smarts with this playful black t-shirt. The design features a white graphic that humorously states "√1764 years old" above the phrase "I KNOW EVERYTHING," alluding to intellectual maturity with a mathematical twist. The clean, crisp print stands out against the dark fabric, making it a fun conversation starter. Perfect for math enthusiasts or anyone with a great sense of humor. Ideal for casual wear, parties, or even as a quirky gift. Get ready to showcase your knowledge and wit with this unique tee!