UM.......

Right now I am watching "Are You Smarter Than A 5th Grader?" and this show is so cool. While watching this show, I have come to realize that the adults that go on this show and they answer the questions that they seem like they didn't know the answer. Like the question,"What is the closest whole number to the square root of 50?" or something like that and I thought I needed a calculator for that when my cousin explained that you go 5x5=25, 6x6=36, and 7x7=49. So the answer is 49, which I felt like I should have known the answer.