I came up with this puzzle the other day. It may not too original or particularly challenging, but I thought it could be fun. What's the next symbol in this sequence? (There's also a hint in here somewhere)
$ { \large \prime \prime } \qquad {\prime \,}_{\Large\prime}^{\Large\prime} \qquad { \Large \circ } \qquad {_{\Large\prime}^{\Large\prime}\Large \circ } \qquad {\Large\prime\,_{\Large\circ}^{\Large\circ} } \qquad {\large ? } $