Someone

on *:TEXT:!numbers*:#:{
  if ($read(over.txt) == Started) { halt }  
  set %rnum $rand(1,25)
  write join.txt [ $+ [ $chan ] ] $nick
  msg $chan $nick has started the random number game. 2 minutes till game starts, type !join to join in.
  timer 0 120 write over.txt Started
}

on *:TEXT:!join*:#:{
  if ($read(over.txt) == Started) { timers off | halt }
  if ($lines(over.txt) = 10) { msg $chan We now have 10 players, type !guess 1-25 to start }
  if ($lines(over.txt) > 10) { notice $nick There is already a game going on! | halt }
  write join.txt [ $+ [ $chan ] ] $nick
  msg $chan We now have $lines(join.txt) players.
}

on *:!guess*:#:{
  if ($read(over.txt) == Started) {
    if ($read(over.txt,$chan,$nick)) {
      write guess.txt [ $+ [ $chan ] ] $2
      msg $chan $nick guessed $2 and was...
      if ($2 == %rnum) {
        timer 0 5 msg $chan RIGHT!
        unset %rnum
        remove over.txt
        remove join.txt
      }
      else {
        timer 0 5 msg $chan $nick was WRONG. He was apprx, $calc(%rnum / $2 ($rand(-,+) 3)) off.
      }
    }
  }
}