Funny Math Birthday T-Shirt - Square Root of 169 = 13 Years Old

Black Funny Math Birthday T-Shirt - Square Root of 169 = 13 Years Old main image
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This classic black t-shirt features a witty math-themed design, perfect for celebrating a 13th birthday! The design prominently displays the square root of 169, which equals 13, cleverly representing the age. The text "YEARS OLD" is placed beneath, emphasizing the playful message. Made from what appears to be a soft, comfortable cotton blend, this tee offers both style and comfort. Ideal for birthday parties, school events, or casual wear, this shirt is sure to spark conversation and laughter. A fun and unique gift for the math enthusiast turning thirteen!

Tags:

#t-shirt #birthday #math #13th birthday #square root #black shirt #casual wear #gift idea #teen #teenager
$35.99 $9.99

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Variant 1 of Funny Math Birthday T-Shirt - Square Root of 169 = 13 Years Old
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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.