Watch Ashton Kutcher And Danny Masterson Challenge Real-Life Brothers To A Hilarious Whiteboard Battle

We played a game to find out just how well they know each other.

Ashton Kutcher and Danny Masterson play brothers on the new Netflix series The Ranch, but how well do they really know each other? 

To find out, we played a game that tested their knowledge. During "The Brother Challenge," Kutcher and Masterson sat down at a table on the set of The Ranch to answer questions about each other's personal life. 

Armed with a whiteboard and a marker, each actor wrote his answer down. Then, they flipped their boards over to see if the responses matched up. For each question the fake brothers answered correctly about their brother, they received one point.  

The catch? They had to answer more questions correctly than a pair of real brothers.

Check out the video above to find out who wins. Is there something unique about the bond that real siblings share? Or can longtime friends like Kutcher and Masterson be just as close as flesh and blood?

Ashton Kutcher is a co-founder of A Plus.