euler/ipython/EulerProblem001.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Euler Problem 1\n",
    "\n",
    "If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.\n",
    "\n",
    "Find the sum of all the multiples of 3 or 5 below 1000."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "def get_sum_of_natural_dividable_by_3_and_5_below(m):\n",
    "    return sum([x for x in range(m) if x % 3 == 0 or x % 5 == 0])"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Test example provided in problem statement:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "assert(get_sum_of_natural_dividable_by_3_and_5_below(10) == 23)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "233168\n"
     ]
    }
   ],
   "source": [
    "print(get_sum_of_natural_dividable_by_3_and_5_below(1000))"
   ]
  }
 ],
 "metadata": {
  "completion_date": "Tue, 19 Aug 2014, 20:11",
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   "language": "python",
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  "tags": [
   "brute force"
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