Sixty!

While giving the kids math problems to solve at dinner, Jacob asked what's 53.7 + 6.3? Brody had answered the past few and sat this one out. Logan shouted "SIXTY!" The three of us stared at him in disbelief as Brody said "you guessed." Logan emphatically replied, "No! I didn't!" and did a victory dance at the table. As Jacob and I continued looking at our mathematical genius, jaws dropped, Logan continued "I just picked a random number!"