Funny Math Birthday T-Shirt - Square Root of 169 = 13 Years Old
This black t-shirt features a clever math joke design, perfect for a 13th birthday celebration. The design incorporates a square root symbol with the number 169, followed by the text "Years Old," cleverly implying that the wearer is 13 years old. Made from comfortable fabric, this tee is ideal for casual wear, birthday parties, or as a fun gift for math enthusiasts. The design is bold and eye-catching, sure to spark conversation and laughter. Celebrate turning 13 with a touch of humor and mathematical flair in this unique birthday tee!
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FAQ
Size Guide
Our tees fit true-to-size. Check the size chart before ordering to ensure a perfect fit.
Shipping Time
Processing 2–3 business days; standard delivery 5–12 business days depending on destination.
Care Instructions
Machine wash cold with like colors. Do not bleach. Tumble dry low. Iron inside-out if needed.