QuantBet Developer Challenge

quantbet-dev-challenge.php

<?php

require __DIR__ . '/vendor/autoload.php';

$client = new \GuzzleHttp\Client();
$jar = new \GuzzleHttp\Cookie\CookieJar();

$res = $client->request('GET', 'http://quantbet.com/quiz/dev', [
	'cookies' => $jar,
]);

preg_match_all('#<strong>([0-9]+)</strong>#', $res->getBody()->getContents(), $matches);

$gmp = gmp_gcd($matches[1][0], $matches[1][1]);
$answer = gmp_strval($gmp);

$res = $client->request('POST', 'http://www.quantbet.com/submit', [
	'cookies' => $jar,
	'form_params' => [
		'divisor' => $answer,
	],
]);

echo $res->getBody()->getContents();

@physicsboy assuming you have composer and php installed, something like

composer require guzzle/guzzle
php quantbet-dev-challenge.php