diff --git a/your-code/challenges.ipynb b/your-code/challenges.ipynb
index ba91b3f..99e8e19 100644
--- a/your-code/challenges.ipynb
+++ b/your-code/challenges.ipynb
@@ -13,11 +13,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 12,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "tup =(\"I\")"
    ]
   },
   {
@@ -31,11 +32,41 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 13,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "str"
+      ]
+     },
+     "execution_count": 13,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here"
+    "# Your code \n",
+    "type(tup)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 15,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "<class 'type'>\n"
+     ]
+    }
+   ],
+   "source": [
+    "tup= type(tup)\n",
+    "print(type(tup))"
    ]
   },
   {
@@ -53,18 +84,39 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 16,
    "metadata": {
     "scrolled": true
    },
-   "outputs": [],
+   "outputs": [
+    {
+     "ename": "AttributeError",
+     "evalue": "type object 'type' has no attribute 'append'",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
+      "\u001b[1;31mAttributeError\u001b[0m                            Traceback (most recent call last)",
+      "Input \u001b[1;32mIn [16]\u001b[0m, in \u001b[0;36m<cell line: 2>\u001b[1;34m()\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[38;5;66;03m# Your code here\u001b[39;00m\n\u001b[1;32m----> 2\u001b[0m \u001b[43mtup\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mappend\u001b[49m(\u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mr\u001b[39m\u001b[38;5;124m\"\u001b[39m, \u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mo\u001b[39m\u001b[38;5;124m\"\u001b[39m, \u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mn\u001b[39m\u001b[38;5;124m\"\u001b[39m, \u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mh\u001b[39m\u001b[38;5;124m\"\u001b[39m, \u001b[38;5;124m\"\u001b[39m\u001b[38;5;124ma\u001b[39m\u001b[38;5;124m\"\u001b[39m, \u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mc\u001b[39m\u001b[38;5;124m\"\u001b[39m, \u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mk\u001b[39m\u001b[38;5;124m\"\u001b[39m)\n\u001b[0;32m      3\u001b[0m \u001b[38;5;28mprint\u001b[39m(tup)\n",
+      "\u001b[1;31mAttributeError\u001b[0m: type object 'type' has no attribute 'append'"
+     ]
+    }
+   ],
    "source": [
     "# Your code here\n",
-    "\n",
+    "tup.append(\"r\", \"o\", \"n\", \"h\", \"a\", \"c\", \"k\")\n",
+    "print(tup)\n",
     "# Your explanation here\n",
     "# You can :) "
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "\n",
+    "Comment: Tuple is immutable(unchangeble once it created), its alredy defined with \"I\", this append wil ask to modify which cannot possible"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -84,7 +136,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "#Re-assign the elements to tup is also not possible once it is defined"
    ]
   },
   {
@@ -106,7 +159,9 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "tup =(\"I\", \"r\", \"o\", \"n\", \"h\", \"a\", \"c\", \"k\")\n",
+    "# Tuple is immutable(unchangeble once it created),"
    ]
   },
   {
@@ -124,7 +179,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "#Tuple is immutable(unchangeble once it created),"
    ]
   },
   {
@@ -136,11 +192,28 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 17,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "4\n",
+      "4\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "tup1 = (\"I\", \"r\", \"o\", \"n\")\n",
+    "tup2 = (\"h\", \"a\", \"c\", \"k\")\n",
+    "# tup 3 is not possible agian we are making changes which are not possibele becuase tuples are immutable\n",
+    "print(len(tup1))\n",
+    "print(len(tup2))\n",
+    "\n",
+    "# tup 1 has 4 elements\n",
+    "# tup 2 has 4 elemnts"
    ]
   },
   {
@@ -152,11 +225,26 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 19,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "4"
+      ]
+     },
+     "execution_count": 19,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "tup3 = (\"I\", \"r\", \"o\", \"n\", \"h\", \"a\", \"c\", \"k\")\n",
+    "tup3.index(\"h\")\n",
+    "# \"h\" is at index 4\n",
+    "# Tuple is immutable(unchangeble once it created),"
    ]
   },
   {
@@ -176,11 +264,26 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 22,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "True\n",
+      "False\n",
+      "True\n",
+      "False\n",
+      "False\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "letters = [\"a\", \"b\", \"c\", \"d\", \"e\"]\n",
+    "for letter in letters:\n",
+    "    print(letter in tup3)"
    ]
   },
   {
@@ -189,7 +292,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "# \"a\", \"c\", are found in tup3"
    ]
   },
   {
@@ -203,11 +307,25 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 23,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "a: 1\n",
+      "b: 0\n",
+      "c: 1\n",
+      "d: 0\n",
+      "e: 0\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "for letter in letters:\n",
+    "    print(f\"{letter}: {tup3.count(letter)}\")"
    ]
   },
   {
@@ -223,7 +341,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 51,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -248,11 +366,21 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 52,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[15, 29, 66, 83, 70, 22, 64, 96, 13, 28, 99, 67, 37, 21, 57, 41, 44, 92, 2, 36, 54, 7, 24, 79, 3, 71, 34, 5, 46, 9, 11, 19, 91, 78, 0, 10, 26, 88, 50, 4, 56, 68, 48, 62, 43, 75, 98, 45, 25, 52, 23, 97, 39, 73, 58, 72, 89, 77, 60, 18, 14, 80, 38, 61, 20, 42, 32, 82, 1, 33, 47, 40, 17, 63, 84, 69, 27, 59, 100, 85]\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here"
+    "sample_list_1 = random.sample(range(0, 101), 80)\n",
+    "\n",
+    "print(sample_list_1)\n"
    ]
   },
   {
@@ -264,11 +392,22 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 53,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "80\n"
+     ]
+    }
+   ],
    "source": [
-    "# your code here"
+    "# your code here\n",
+    "set1= set(sample_list_1)\n",
+    "type(set1)\n",
+    "print(len(set1))"
    ]
   },
   {
@@ -287,11 +426,26 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 54,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[37, 40, 48, 26, 47, 79, 23, 29, 80, 54, 67, 82, 77, 48, 34, 35, 26, 43, 97, 31, 85, 79, 47, 70, 32, 59, 51, 37, 28, 64, 58, 2, 54, 68, 100, 16, 4, 48, 58, 75, 62, 83, 85, 79, 2, 2, 11, 89, 76, 87, 86, 6, 90, 35, 25, 94, 44, 68, 39, 67, 25, 13, 83, 44, 7, 36, 15, 92, 89, 47, 61, 74, 21, 11, 90, 29, 100, 63, 59, 31]\n"
+     ]
+    }
+   ],
    "source": [
-    "# your code here"
+    "# your code here\n",
+    "sample_list_2 = []\n",
+    "for sample in random.choices(range(0, 101), k= 80):\n",
+    "    sample_list_2.append(sample)\n",
+    "\n",
+    "print(sample_list_2)\n",
+    "    \n",
+    "    "
    ]
   },
   {
@@ -303,11 +457,31 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 55,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "54\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Your code here\n",
+    "set2 =set(sample_list_2)\n",
+    "type(set2)\n",
+    "print(len(set2))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 58,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here"
+    "# no its length is not 80, length is 54  becuase set is not allowed duplicate elemnts to be printed"
    ]
   },
   {
@@ -319,11 +493,24 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 59,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{0, 1, 3, 5, 9, 10, 14, 17, 18, 19, 20, 22, 24, 27, 33, 38, 41, 42, 45, 46, 50, 52, 56, 57, 60, 66, 69, 71, 72, 73, 78, 84, 88, 91, 96, 98, 99}\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "set3 = set()\n",
+    "for element in set1:\n",
+    "    if element not in set2:\n",
+    "        set3.add(element)\n",
+    "print(set3)\n"
    ]
   },
   {
@@ -335,11 +522,24 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 60,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{35, 6, 74, 76, 16, 51, 86, 87, 90, 94, 31}\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "set4 =set()\n",
+    "for element in set2:\n",
+    "    if element not in set1:\n",
+    "        set4.add(element)\n",
+    "print(set4)"
    ]
   },
   {
@@ -351,11 +551,24 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 64,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{2, 4, 7, 11, 13, 15, 21, 23, 25, 26, 28, 29, 32, 34, 36, 37, 39, 40, 43, 44, 47, 48, 54, 58, 59, 61, 62, 63, 64, 67, 68, 70, 75, 77, 79, 80, 82, 83, 85, 89, 92, 97, 100}\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "set5 = set()\n",
+    "for element in set1:\n",
+    "    if element in set2:\n",
+    "        set5.add(element)\n",
+    "print(set5)\n"
    ]
   },
   {
@@ -375,11 +588,29 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 62,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "80\n",
+      "54\n",
+      "37\n",
+      "11\n",
+      "54\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "\n",
+    "print(len(set1))\n",
+    "print(len(set2))\n",
+    "print(len(set3))\n",
+    "print(len(set4))\n",
+    "print(len(set5))"
    ]
   },
   {
@@ -391,11 +622,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 69,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "set6 =set()"
    ]
   },
   {
@@ -407,11 +639,22 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 70,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{0, 1, 2, 3, 4, 5, 7, 9, 10, 11, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 32, 33, 34, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 52, 54, 56, 57, 58, 59, 60, 61, 62, 63, 64, 66, 67, 68, 69, 70, 71, 72, 73, 75, 77, 78, 79, 80, 82, 83, 84, 85, 88, 89, 91, 92, 96, 97, 98, 99, 100}\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here"
+    "\n",
+    "set6.update(set3, set5)\n",
+    "\n",
+    "print(set6)\n"
    ]
   },
   {
@@ -423,11 +666,21 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 71,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "equal\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "if set1 == set6:\n",
+    "    print(\"equal\")"
    ]
   },
   {
@@ -439,11 +692,26 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 72,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "False\n",
+      "True\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "\n",
+    "print(set2.issubset(set1))\n",
+    "\n",
+    "print(set3.issubset(set1))\n",
+    "\n",
+    "    "
    ]
   },
   {
@@ -457,11 +725,24 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 73,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "True\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here"
+    "\n",
+    "agg1 = set3.union(set4, set5)\n",
+    "\n",
+    "agg2 = set1.union(set2)\n",
+    "\n",
+    "print(agg1 == agg2)\n"
    ]
   },
   {
@@ -473,11 +754,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 77,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "2"
+      ]
+     },
+     "execution_count": 77,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "set1.pop()\n"
    ]
   },
   {
@@ -493,11 +786,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 80,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{3, 4, 5, 7, 10, 13, 14, 15, 17, 18, 20, 22, 23, 24, 25, 26, 27, 28, 32, 33, 34, 36, 37, 38, 40, 42, 43, 44, 45, 46, 47, 48, 50, 52, 54, 56, 57, 58, 60, 62, 63, 64, 66, 67, 68, 70, 72, 73, 75, 77, 78, 80, 82, 83, 84, 85, 88, 92, 96, 97, 98, 100}\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "list_to_remove = [1, 9, 11, 19, 21, 29, 31, 39, 41, 49, 51, 59, 61, 69, 71, 79, 81, 89, 91, 99]\n",
+    "for element in list_to_remove:\n",
+    "    set1.discard(element)\n",
+    "print(set1)"
    ]
   },
   {
@@ -616,7 +921,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.9.12"
   },
   "vscode": {
    "interpreter": {