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Celebrate birthdays with a clever twist! This funny math design uses equations and square roots to reveal the age, making it the perfect choice for math lovers, teachers, students, and geeks who enjoy a good nerdy joke. Great for milestone birthdays, classroom celebrations, or anyone who appreciates clever humor mixed with numbers. This witty math-inspired design turns age into a fun square root equation, bringing laughter and geeky charm to any party. Ideal for math teachers, STEM students, engineers, and puzzle fans, it’s a smart and funny way to celebrate birthdays with style. Perfect for cards, shirts, mugs, or party decorations.