Some days back, walking through the park, I saw a little girl trying play the see-saw all by herself. It takes two to see-saw, but here was a girl who was ingenious enough to try and see-saw on her own. I saw her trying a number of bricks to one end of the plank to balance her weight at the other. I curiously noted that she just balanced against sixteen bricks, when these were fixed to the short end of the plank and I also noticed that if she were to fix them to the long end of the plank, she only needed eleven as balance. I wondered what the girl’s weight was. The brick, I could guess weighed equal to a three quarter brick and three quarters of a pound. Can you figure it out?