diff --git a/src/activities/memory-enumerate/resource/1/Data.qml b/src/activities/memory-enumerate/resource/1/Data.qml
--- a/src/activities/memory-enumerate/resource/1/Data.qml
+++ b/src/activities/memory-enumerate/resource/1/Data.qml
@@ -29,24 +29,16 @@
     property string url: "qrc:/gcompris/src/activities/memory-enumerate/resource/"
 
     property var texts: [
-                ["", 1],
-                ["", 2],
                 ["", 1],
                 ["", 2]
             ]
 
     property var images: [
                 [url + 'math_1.svg', ''],
                 [url + 'math_2.svg', ''],
-                [url + 'math_1.svg', ''],
-                [url + 'math_2.svg', '']
             ]
 
     property var sounds: [
-                ["",
-                 GCompris.ApplicationInfo.getAudioFilePath("voices-$CA/$LOCALE/alphabet/U0031.$CA")],
-                ["",
-                 GCompris.ApplicationInfo.getAudioFilePath("voices-$CA/$LOCALE/alphabet/U0032.$CA")],
                 ["",
                  GCompris.ApplicationInfo.getAudioFilePath("voices-$CA/$LOCALE/alphabet/U0031.$CA")],
                 ["",
@@ -57,9 +49,9 @@
         { // Level 1
             "columns": 2,
             "rows": 2,
-            "texts": texts.slice(0, 4),
-            "images": images.slice(0, 4),
-            "sounds": sounds.slice(0, 4)
+            "texts": texts.slice(0, 2),
+            "images": images.slice(0, 2),
+            "sounds": sounds.slice(0, 2)
         }
     ]
 }
diff --git a/src/activities/memory-enumerate/resource/2/Data.qml b/src/activities/memory-enumerate/resource/2/Data.qml
--- a/src/activities/memory-enumerate/resource/2/Data.qml
+++ b/src/activities/memory-enumerate/resource/2/Data.qml
@@ -31,32 +31,28 @@
     property var texts: [
                 ["", 1],
                 ["", 2],
-                ["", 2],
                 ["", 3]
 
             ]
 
     property var images: [
                 [url + 'math_1.svg', ''],
                 [url + 'math_2.svg', ''],
-                [url + 'math_2.svg', ''],
                 [url + 'math_3.svg', '']
             ]
 
     property var sounds: [
                 ["",
                  GCompris.ApplicationInfo.getAudioFilePath("voices-$CA/$LOCALE/alphabet/U0031.$CA")],
                 ["",
                  GCompris.ApplicationInfo.getAudioFilePath("voices-$CA/$LOCALE/alphabet/U0032.$CA")],
-                ["",
-                 GCompris.ApplicationInfo.getAudioFilePath("voices-$CA/$LOCALE/alphabet/U0032.$CA")],
                 ["",
                  GCompris.ApplicationInfo.getAudioFilePath("voices-$CA/$LOCALE/alphabet/U0033.$CA")]
             ]
 
     data: [
         { // Level 1
-            "columns": 2,
+            "columns": 3,
             "rows": 2,
             "texts": texts.slice(0, 4),
             "images": images.slice(0, 4),
diff --git a/src/activities/memory-enumerate/resource/3/Data.qml b/src/activities/memory-enumerate/resource/3/Data.qml
--- a/src/activities/memory-enumerate/resource/3/Data.qml
+++ b/src/activities/memory-enumerate/resource/3/Data.qml
@@ -55,7 +55,7 @@
 
     data: [
         { // Level 1
-            "columns": 2,
+            "columns": 4,
             "rows": 2,
             "texts": texts.slice(0, 4),
             "images": images.slice(0, 4),
diff --git a/src/activities/memory-enumerate/resource/4/Data.qml b/src/activities/memory-enumerate/resource/4/Data.qml
--- a/src/activities/memory-enumerate/resource/4/Data.qml
+++ b/src/activities/memory-enumerate/resource/4/Data.qml
@@ -63,8 +63,8 @@
 
     data: [
         { // Level 1
-            "columns": 3,
-            "rows": 2,
+            "columns": 4,
+            "rows": 3,
             "texts": texts.slice(0, 6),
             "images": images.slice(0, 6),
             "sounds": sounds.slice(0, 6)
diff --git a/src/activities/memory-enumerate/resource/5/Data.qml b/src/activities/memory-enumerate/resource/5/Data.qml
--- a/src/activities/memory-enumerate/resource/5/Data.qml
+++ b/src/activities/memory-enumerate/resource/5/Data.qml
@@ -69,8 +69,8 @@
 
     data: [
         { // Level 1
-            "columns": 3,
-            "rows": 2,
+            "columns": 4,
+            "rows": 3,
             "texts": texts.slice(0, 7),
             "images": images.slice(0, 7),
             "sounds": sounds.slice(0, 7)
diff --git a/src/activities/memory-enumerate/resource/6/Data.qml b/src/activities/memory-enumerate/resource/6/Data.qml
--- a/src/activities/memory-enumerate/resource/6/Data.qml
+++ b/src/activities/memory-enumerate/resource/6/Data.qml
@@ -72,7 +72,7 @@
     data: [
         { // Level 1
             "columns": 4,
-            "rows": 2,
+            "rows": 4,
             "texts": texts.slice(0, 8),
             "images": images.slice(0, 8),
             "sounds": sounds.slice(0, 8)
diff --git a/src/activities/memory-enumerate/resource/7/Data.qml b/src/activities/memory-enumerate/resource/7/Data.qml
--- a/src/activities/memory-enumerate/resource/7/Data.qml
+++ b/src/activities/memory-enumerate/resource/7/Data.qml
@@ -76,7 +76,7 @@
     data: [
         { // Level 1
             "columns": 4,
-            "rows": 2,
+            "rows": 4,
             "texts": texts.slice(0, 9),
             "images": images.slice(0, 9),
             "sounds": sounds.slice(0, 9)
diff --git a/src/activities/memory-enumerate/resource/8/Data.qml b/src/activities/memory-enumerate/resource/8/Data.qml
--- a/src/activities/memory-enumerate/resource/8/Data.qml
+++ b/src/activities/memory-enumerate/resource/8/Data.qml
@@ -80,7 +80,7 @@
     data: [
         { // Level 1
             "columns": 5,
-            "rows": 2,
+            "rows": 4,
             "texts": texts.slice(0, 10),
             "images": images.slice(0, 10),
             "sounds": sounds.slice(0, 10)
diff --git a/src/activities/memory/memory.js b/src/activities/memory/memory.js
--- a/src/activities/memory/memory.js
+++ b/src/activities/memory/memory.js
@@ -70,7 +70,7 @@
                 sounds ? sounds.length : 0,
                 texts ? texts.length : 0)
 
-    if(rows * columns > maxData) {
+    if(rows * columns  > maxData * 2) {
         console.log("ERROR: Memory dataset does not have enough data pairs at level ",
                     currentLevel + 1)
         return