Vintage Square Root of 1600: 40th Birthday 40 Years Old Tee-TH

Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 65% Cotton, 35% Polyester, Imported, Machine wash cold with like colors, dry low heat, Funny vintage simple math problem square root of 1600 40th birthday shirt. Adorable gift shirt for a math loving daughter, son, granddaughter, grandson, nephew, niece. Birthday present for 40 year old official teenager 40th bday celebration. Vintage distressed Square Root of 1600 T-Shirt made to have fun on your 40th birthday with this funny math nerd shirt for man and; women. Lightweight, Classic fit, Double-needle sleeve and bottom hem