on *:text:*:#: { 
  if $strip($1-) == $gettok(%questions,2,169) {
    .disable #texto
    .timers off
    correct_answer
    $voice($nick,$chan)    
  }
}

alias voice {
  if !$istok(%voice,$1,32) { 
    set %voice $addtok(%voice,$1,32)
    mode $2 +v $1
  }
}

====================== OR ======================
 
on *:text:*:#: { 
  if $strip($1-) == $gettok(%questions,2,169) {
    .disable #texto
    .timers off
    correct_answer
    if !$istok(%voice,$nick,32) { 
      set %voice $addtok(%voice,$nick,32)
      mode $chan +v $nick
    } 
  }
}