diff --git a/src/activities/target/resource/1/Data.qml b/src/activities/target/resource/1/Data.qml
index 42e4d2088..e3721dcdb 100644
--- a/src/activities/target/resource/1/Data.qml
+++ b/src/activities/target/resource/1/Data.qml
@@ -1,60 +1,60 @@
 
 /* GCompris - Data.qml
  *
  * Copyright (C) 2019 Akshay Kumar <email.akshay98@gmail.com>
  *
  * Authors:
  *   Akshay Kumar <email.akshay98@gmail.com>
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
  *   the Free Software Foundation; either version 3 of the License, or
  *   (at your option) any later version.
  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
  *   You should have received a copy of the GNU General Public License
  *   along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 import QtQuick 2.6
 import GCompris 1.0
 import "../../../../core"
 
 Dataset {
     objective: qsTr("Practice addition on targets with max value 10")
-    difficulty: 1
+    difficulty: 2
     property var colors: [
         "#ff1b00",
         "#7edee2",
         "#f1f500",
         "#3dff00",
         "#b7d2d4",
         "#6db5ba"
     ]
     data: [
         [
             {size: 50, color: colors[0], score: 5},
             {size: 100, color: colors[1], score: 4},
             {size: 150, color: colors[2], score: 3},
             {size: 200, color: colors[3], score: 2},
             {size: 250, color: colors[4], score: 1}
         ],
         [
             {size: 50, color: colors[0], score: 7},
             {size: 100, color: colors[1], score: 5},
             {size: 150, color: colors[2], score: 3},
             {size: 200, color: colors[3], score: 2},
             {size: 250, color: colors[4], score: 1}
         ],
         [
             {size: 50, color: colors[0], score: 10},
             {size: 100, color: colors[1], score: 7},
             {size: 150, color: colors[2], score: 5},
             {size: 200, color: colors[3], score: 3},
             {size: 250, color: colors[4], score: 2}
         ]
     ]
 }
diff --git a/src/activities/target/resource/2/Data.qml b/src/activities/target/resource/2/Data.qml
index c2e0987e7..44f50e2b7 100644
--- a/src/activities/target/resource/2/Data.qml
+++ b/src/activities/target/resource/2/Data.qml
@@ -1,65 +1,65 @@
 
 /* GCompris - Data.qml
  *
  * Copyright (C) 2019 Akshay Kumar <email.akshay98@gmail.com>
  *
  * Authors:
  *   Akshay Kumar <email.akshay98@gmail.com>
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
  *   the Free Software Foundation; either version 3 of the License, or
  *   (at your option) any later version.
  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
  *   You should have received a copy of the GNU General Public License
  *   along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 import QtQuick 2.6
 import GCompris 1.0
 import "../../../../core"
 
 Dataset {
     objective: qsTr("Practice addition on targets with max value 50")
-    difficulty: 1
+    difficulty: 3
     property var colors: [
         "#ff1b00",
         "#7edee2",
         "#f1f500",
         "#3dff00",
         "#b7d2d4",
         "#6db5ba"
     ]
     data: [
         [
             {size: 50, color: colors[0], score: 20},
             {size: 100, color: colors[1], score: 10},
             {size: 150, color: colors[2], score: 8},
             {size: 200, color: colors[3], score: 4},
             {size: 250, color: colors[4], score: 2},
             {size: 300, color: colors[5], score: 1}
         ],
         [
             {size: 50, color: colors[0], score: 30},
             {size: 100, color: colors[1], score: 20},
             {size: 150, color: colors[2], score: 10},
             {size: 200, color: colors[3], score: 8},
             {size: 250, color: colors[4], score: 4},
             {size: 300, color: colors[5], score: 2},
             {size: 350, color: colors[5], score: 1}
         ],
         [
             {size: 50, color: colors[0], score: 50},
             {size: 100, color: colors[1], score: 20},
             {size: 150, color: colors[2], score: 10},
             {size: 200, color: colors[3], score: 8},
             {size: 250, color: colors[4], score: 4},
             {size: 300, color: colors[5], score: 2},
             {size: 350, color: colors[5], score: 1}
         ]
     ]
 }
diff --git a/src/activities/target/resource/3/Data.qml b/src/activities/target/resource/3/Data.qml
index 6a2fabf6a..6b3dabd64 100644
--- a/src/activities/target/resource/3/Data.qml
+++ b/src/activities/target/resource/3/Data.qml
@@ -1,71 +1,71 @@
 
 /* GCompris - Data.qml
  *
  * Copyright (C) 2019 Akshay Kumar <email.akshay98@gmail.com>
  *
  * Authors:
  *   Akshay Kumar <email.akshay98@gmail.com>
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
  *   the Free Software Foundation; either version 3 of the License, or
  *   (at your option) any later version.
  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
  *   You should have received a copy of the GNU General Public License
  *   along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 import QtQuick 2.6
 import GCompris 1.0
 import "../../../../core"
 
 Dataset {
     objective: qsTr("Practice addition on targets with max value 500")
-    difficulty: 1
+    difficulty: 4
     property var colors: [
         "#ff1b00",
         "#7edee2",
         "#f1f500",
         "#3dff00",
         "#b7d2d4",
         "#6db5ba"
     ]
     data: [
         [
             {size: 50, color: colors[0], score: 100},
             {size: 100, color: colors[1], score: 20},
             {size: 150, color: colors[2], score: 10},
             {size: 200, color: colors[3], score: 8},
             {size: 250, color: colors[4], score: 4},
             {size: 300, color: colors[5], score: 2},
             {size: 350, color: colors[5], score: 1}
         ],
         [
             {size: 50, color: colors[0], score: 300},
             {size: 100, color: colors[1], score: 100},
             {size: 150, color: colors[2], score: 30},
             {size: 200, color: colors[3], score: 20},
             {size: 250, color: colors[3], score: 10},
             {size: 300, color: colors[4], score: 8},
             {size: 350, color: colors[4], score: 4},
             {size: 400, color: colors[5], score: 2},
             {size: 450, color: colors[5], score: 1},
         ],
         [
             {size: 50, color: colors[0], score: 500},
             {size: 100, color: colors[1], score: 300},
             {size: 150, color: colors[2], score: 100},
             {size: 200, color: colors[2], score: 30},
             {size: 250, color: colors[3], score: 20},
             {size: 300, color: colors[3], score: 10},
             {size: 350, color: colors[4], score: 8},
             {size: 400, color: colors[4], score: 4},
             {size: 450, color: colors[5], score: 2},
             {size: 450, color: colors[5], score: 1}
         ]
     ]
 }
diff --git a/src/activities/target/resource/4/Data.qml b/src/activities/target/resource/4/Data.qml
index a25337d1b..a8c138d05 100644
--- a/src/activities/target/resource/4/Data.qml
+++ b/src/activities/target/resource/4/Data.qml
@@ -1,75 +1,75 @@
 
 /* GCompris - Data.qml
  *
  * Copyright (C) 2019 Akshay Kumar <email.akshay98@gmail.com>
  *
  * Authors:
  *   Akshay Kumar <email.akshay98@gmail.com>
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
  *   the Free Software Foundation; either version 3 of the License, or
  *   (at your option) any later version.
  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
  *   You should have received a copy of the GNU General Public License
  *   along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 import QtQuick 2.6
 import GCompris 1.0
 import "../../../../core"
 
 Dataset {
     objective: qsTr("Practice addition on targets with max value 50000")
-    difficulty: 1
+    difficulty: 5
     property var colors: [
         "#ff1b00",
         "#7edee2",
         "#f1f500",
         "#3dff00",
         "#b7d2d4",
         "#6db5ba"
     ]
     data: [
         [
             {size: 50, color: colors[0], score: 100},
             {size: 100, color: colors[1], score: 20},
             {size: 150, color: colors[2], score: 10},
             {size: 200, color: colors[3], score: 8},
             {size: 250, color: colors[4], score: 4},
             {size: 300, color: colors[5], score: 2},
             {size: 350, color: colors[5], score: 1}
         ],
         [
             {size: 50, color: colors[0], score: 10000},
             {size: 100, color: colors[1], score: 4000},
             {size: 150, color: colors[1], score: 1000},
             {size: 200, color: colors[2], score: 300},
             {size: 250, color: colors[2], score: 100},
             {size: 300, color: colors[3], score: 30},
             {size: 350, color: colors[3], score: 10},
             {size: 400, color: colors[4], score: 8},
             {size: 450, color: colors[4], score: 4},
             {size: 500, color: colors[5], score: 2},
             {size: 550, color: colors[5], score: 1}
         ],
         [
             {size: 50, color: colors[0], score: 50000},
             {size: 100, color: colors[1], score: 10000},
             {size: 150, color: colors[1], score: 4000},
             {size: 200, color: colors[2], score: 1000},
             {size: 250, color: colors[2], score: 300},
             {size: 300, color: colors[3], score: 100},
             {size: 350, color: colors[3], score: 30},
             {size: 400, color: colors[4], score: 10},
             {size: 450, color: colors[4], score: 8},
             {size: 500, color: colors[5], score: 4},
             {size: 550, color: colors[5], score: 2},
             {size: 600, color: colors[5], score: 1},
         ]
     ]
 }
diff --git a/src/activities/target/resource/5/Data.qml b/src/activities/target/resource/5/Data.qml
index 97ff27c84..048757c17 100644
--- a/src/activities/target/resource/5/Data.qml
+++ b/src/activities/target/resource/5/Data.qml
@@ -1,79 +1,79 @@
 
 /* GCompris - Data.qml
  *
  * Copyright (C) 2019 Akshay Kumar <email.akshay98@gmail.com>
  *
  * Authors:
  *   Akshay Kumar <email.akshay98@gmail.com>
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
  *   the Free Software Foundation; either version 3 of the License, or
  *   (at your option) any later version.
  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
  *   You should have received a copy of the GNU General Public License
  *   along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 import QtQuick 2.6
 import GCompris 1.0
 import "../../../../core"
 
 Dataset {
     objective: qsTr("Practice addition on targets with max value 500000")
-    difficulty: 1
+    difficulty: 6
     property var colors: [
         "#ff1b00",
         "#7edee2",
         "#f1f500",
         "#3dff00",
         "#b7d2d4",
         "#6db5ba",
         "#ffffff"
     ]
     
     data: [
         [
             {size: 50, color: colors[0], score: 100},
             {size: 100, color: colors[1], score: 20},
             {size: 150, color: colors[2], score: 10},
             {size: 200, color: colors[3], score: 8},
             {size: 250, color: colors[4], score: 4},
             {size: 300, color: colors[5], score: 2},
             {size: 350, color: colors[5], score: 1}
         ],
         [
             {size: 50, color: colors[0], score: 10000},
             {size: 100, color: colors[1], score: 4000},
             {size: 150, color: colors[1], score: 1000},
             {size: 200, color: colors[2], score: 300},
             {size: 250, color: colors[2], score: 100},
             {size: 300, color: colors[3], score: 30},
             {size: 350, color: colors[3], score: 10},
             {size: 400, color: colors[4], score: 8},
             {size: 450, color: colors[4], score: 4},
             {size: 500, color: colors[5], score: 2},
             {size: 550, color: colors[5], score: 1}
         ],
         [
             {size: 50, color: colors[0], score: 500000},
             {size: 100, color: colors[1], score: 100000},
             {size: 150, color: colors[1], score: 50000},
             {size: 200, color: colors[2], score: 10000},
             {size: 250, color: colors[2], score: 4000},
             {size: 300, color: colors[3], score: 1000},
             {size: 350, color: colors[3], score: 300},
             {size: 400, color: colors[4], score: 100},
             {size: 450, color: colors[4], score: 30},
             {size: 500, color: colors[5], score: 10},
             {size: 550, color: colors[5], score: 8},
             {size: 600, color: colors[6], score: 4},
             {size: 650, color: colors[6], score: 2},
             {size: 700, color: colors[6], score: 1},
         ]
     ]
 }