This humorous black t-shirt features a math-inspired design, perfect for birthdays or casual wear. The graphic shows the square root of 225, cleverly conveying the wearer's age as 15 years old. Crafted from a comfortable-looking fabric, this tee offers a relaxed fit for everyday wear. Its clean design and clever math joke makes it a great conversation starter. Ideal for math enthusiasts or anyone with a good sense of humor, this t-shirt is a fun way to celebrate a 15th birthday or showcase your love for math. Sure to be a favorite in any casual wardrobe!