Personalized Trump 45 IQ Youth T-Shirt. Trump 45 - That's his IQ. Trump will tell you lots of things. He will tell you he's smart. Don't believe it! The 45 stands for his IQ. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.