30 Cows in a Field [RIDDLE]

Have you seen this riddle making its way through your newsfeed on Facebook or Twitter this week? If you have, did you solve it? It took me a while to figure it out, but after I did, I had to share it with YOU. 

So the riddle begins like this: "There are 30 cows in a field..." I won't type the rest out since it's SUPER important that you listen carefully.

Did you figure it out yet? Let us know by leaving a comment below. I'll admit that it took me almost 90 seconds to figure it out. This is a great riddle to ask by the pool or on the beach today.