Funny Math 13th Birthday Square Root Graphic Tee

This black t-shirt features a playful mathematical design. The white graphic displays the square root of 169, followed by the words "YEARS OLD," making it a humorous way to celebrate a 13th birthday or showcase your love for math. The shirt has short sleeves and a classic crew neck. Ideal for casual wear, parties, or math-themed events, this tee is sure to bring a smile. A fun and unique gift idea for the mathematically inclined or anyone turning thirteen.