NOTE: Okay, I wrote a clunker. My apologies. This Brain Game was altered from its original text after readers discovered some exceptions to the NFL's rules, particularly amongst linebackers and linemen. (I knew there were a few, but also assumed that most fans would know that they were atypical.) My bad. We've cleaned up those comments to avoid confusion. Here's the corrected version:
Four NFL players from the same team are the first ones in the locker room before a big game. They wear jerseys #15, #35, #55, and #85. One player is a lineman, one is a punter, one is a wide receiver, one is a running back. Given only this information, and assuming that these four players' squad numbers were provided according to NFL rules...
Match each jersey number to its position.
#15 is the punter
#35 is the running back
#55 is the lineman
#85 is the wide receiver
Although there are exceptions, this Wikipedia article explains how NFL jersey numbers are assigned by rule.