Funny 40th Birthday T-Shirt, Math Pun Tee

This novelty t-shirt is the perfect gift for a 40th birthday! The shirt features a humorous math pun design: the square root of 1600, followed by the words "Years Old". This clever design is sure to get a laugh and makes a great conversation starter. The shirt appears to be made from a soft, comfortable material and has a classic fit. It's ideal for casual wear, parties, or as a gag gift for the math enthusiast in your life. Celebrate a milestone birthday with this fun and unique t-shirt!