Respuesta :

9+10 17+2 3+16 1+18 15+4 13+6 14+5 those are the ones i know off the top of my head
AL2006

In the whole wide world of math, there is only one number that equals 19. 
That number is . . . . . . . . . . wait for it . . . . . . . . . . 19 .