diff --git a/questions.py b/questions.py
index ad2c80b..ad0e9bb 100644
--- a/questions.py
+++ b/questions.py
@@ -302,7 +302,7 @@ class QuestionNumericInterval(Question):
             try:         # replace , by . and convert to float
                 answer = float(self['answer'].replace(',', '.', 1))
             except ValueError:
-                self['comments'] = 'A resposta não é numérica.'
+                self['comments'] = 'A resposta tem de ser numérica, por exemplo 12.345.'
                 self['grade'] = 0.0
             else:
                 self['grade'] = 1.0 if lower <= answer <= upper else 0.0
diff --git a/static/js/topic.js b/static/js/topic.js
index 3b5e01f..e25f272 100644
--- a/static/js/topic.js
+++ b/static/js/topic.js
@@ -7,6 +7,24 @@ $.fn.extend({
     }
 });
 
+function showTriesLeft(tries) {
+    var tries_msg;
+
+    switch (tries) {
+    case 0:
+        tries_msg = "";
+        break;
+    case 1:
+        tries_msg = "(1 tentativa)";
+        break;
+    default:
+        tries_msg = "(" + tries + " tentativas)";
+    }
+
+    $("#tries").html(tries_msg);
+}
+
+
 // Get current question
 function getQuestion() {
     $.ajax({
@@ -32,10 +50,9 @@ function updateQuestion(response) {
         break;
     case "finished_topic":
         $('#submit, #comments, #solution').remove();
-        $("#content").html(response["params"]["question"]);
+        $("#content").html(response["params"]["question"]).animateCSS('tada');
         $('#topic_progress').css('width', '100%').attr('aria-valuenow', 100);
-        $("#content").animateCSS('tada');
-        setTimeout(function(){ window.location.replace('/'); }, 2000);
+        setTimeout(function(){window.location.replace('/');}, 2000);
         break;
     }
 }
@@ -43,22 +60,14 @@ function updateQuestion(response) {
 
 function new_question(type, question, tries, progress) {
     window.scrollTo(0, 0);
-    $("#question_div").html(question);
+    $("#question_div").html(question).animateCSS('bounceInDown');
+    showTriesLeft(tries);
     $("#comments, #solution").html("");
-    if (type == "info") {
-        $("#submit").html("Continuar");
-    }
-    else {
-        $("#submit").html("Responder");
-    }
-    $("#submit").off();
-    $("#submit").click(postAnswer);
-    $("#tries").html(tries);
+    var btn_text = (type == "info") ? "Continuar" : "Responder";
+    $("#submit").html(btn_text).off().click(postAnswer);
     $('#topic_progress').css('width', (100*progress)+'%').attr('aria-valuenow', 100*progress);
     MathJax.Hub.Queue(["Typeset",MathJax.Hub,"question_div"]);
 
-    $('#question_div').animateCSS('bounceInDown');
-
     // enable shift+enter to submit
     $("input:text, input:radio, input:checkbox").keydown(function (e) {
         if (e.keyCode == 13) {
@@ -104,21 +113,18 @@ function getFeedback(response) {
         $('#wrong').hide();
         $('#comments').html(params['comments']);
         MathJax.Hub.Queue(["Typeset", MathJax.Hub, "#comments"]);
-        $("#submit").html("Continuar");
-        $("#submit").off();
-        $("#submit").click(getQuestion);
+        $("#submit").html("Continuar").off().click(getQuestion);
         $("#link_solution_on_right").click(function(){
             $("#right").hide();
-            $('#solution').html(params['solution']);
+            $('#solution').html(params['solution']).animateCSS('flipInX');
             MathJax.Hub.Queue(["Typeset", MathJax.Hub, "#solution"]);
-            $('#solution').animateCSS('flipInX');
         });
         break;
 
     case "try_again":
         $('#question_div').animateCSS('shake');
         $('#topic_progress').css('width', (100*params["progress"])+'%').attr('aria-valuenow', 100*params["progress"]);
-        $("#tries").html(params["tries"]);
+        showTriesLeft(params["tries"]);
         $('#comments').html(params['comments']);
         MathJax.Hub.Queue(["Typeset",MathJax.Hub,"#comments"]);
         break;
@@ -127,19 +133,16 @@ function getFeedback(response) {
         $('#right').hide();
         $('#wrong').show();
         $('#topic_progress').css('width', (100*params["progress"])+'%').attr('aria-valuenow', 100*params["progress"]);
-        $("#tries").html(params["tries"]);
+        showTriesLeft(params["tries"]);
         $('#comments').html(params['comments']);
         MathJax.Hub.Queue(["Typeset", MathJax.Hub, "#comments"]);
         $("#link_solution_on_wrong").click(function () {
             $("#wrong").hide();
-            $('#solution').html(params['solution']);
+            $('#solution').html(params['solution']).animateCSS('flipInX');
             MathJax.Hub.Queue(["Typeset", MathJax.Hub, "#solution"]);
-            $('#solution').animateCSS('flipInX');
         });
         $("fieldset").attr("disabled", "disabled");
-        $("#submit").html("Continuar");
-        $("#submit").off();
-        $("#submit").click(getQuestion);
+        $("#submit").html("Continuar").off().click(getQuestion);
         break;
     }
 }
diff --git a/templates/question.html b/templates/question.html
index 595749b..434a349 100644
--- a/templates/question.html
+++ b/templates/question.html
@@ -8,4 +8,4 @@
 
 {% block answer %}{% end %}
 
-<p class="text-right font-italic">(<span id="tries"></span> tentativas)</p>
+<p class="text-right font-italic" id="tries"></p>
--
libgit2 0.21.2