Yeah, but doing with variables is much more cleaner:

Code:
On *:TEXT:!emo*:#:{
  if ($2 !ison #) {
    .notice $nick Sorry $nick $+ , $2 is not on $chan
  }
  else {
    set %number = $rand(0,100)
    .timer 1 1 msg $chan Testing for $2 $+ \'s emoness ...
    .timer 1 3 msg $chan $2 is %number $+ %
    unset %number
 }
}

No need of /set. ;x Also, for a code like this, variables shouldn\'t be needed because it isn\'t that complicated. Just pointing stuff out.