diff --git a/ProposedProblems/Problem3.ipynb b/ProposedProblems/Problem3.ipynb
new file mode 100644
index 0000000000000000000000000000000000000000..eb54c5a417a4fa6f087d7e6bbfc1facff981bef1
--- /dev/null
+++ b/ProposedProblems/Problem3.ipynb
@@ -0,0 +1,51 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[27, 21, 23]\n"
+     ]
+    }
+   ],
+   "source": [
+    "year = [1994, 1999, 1997, 2001, 2000, 1983, 1989, 1998]\n",
+    "edad = [(2021 - x) for x in year if (x%2 == 0)]\n",
+    "print (edad)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.7.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}
diff --git a/ProposedProblems/Problem4.ipynb b/ProposedProblems/Problem4.ipynb
new file mode 100644
index 0000000000000000000000000000000000000000..0d4e3235765a7aa92e838ab782ae19e105e66d25
--- /dev/null
+++ b/ProposedProblems/Problem4.ipynb
@@ -0,0 +1,85 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Ingrese un numero515\n",
+      "1030\n",
+      "1030\n",
+      "Ingrese otro número\n"
+     ]
+    }
+   ],
+   "source": [
+    "import numpy as np\n",
+    "numero1 = input(\"Ingrese un numero\")\n",
+    "inverse_numero = []\n",
+    "for i in reversed(numero1):\n",
+    "    inverse_numero.append(i)\n",
+    "    numero2 = \"\".join(inverse_numero)\n",
+    "suma = int(numero1) + int(numero2)\n",
+    "print(suma)\n",
+    "\n",
+    "inverse_suma = []\n",
+    "for i in reversed(str(suma)):\n",
+    "    inverse_numero.append(i)\n",
+    "    suma_inv = \"\".join(inverse_numero)\n",
+    "suma = int(numero1) + int(numero2)\n",
+    "print(suma)\n",
+    "\n",
+    "if suma_inv == str(suma):\n",
+    "    print(\"Proceso fializado\")\n",
+    "else:\n",
+    "    print(\"Ingrese otro número\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.7.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}