Full script for the Google Developer Day Quiz (http://developerquiz.appspot.com) in 39 lines

developerquiz.php

<?php                                   //Run as command line. Input file as first argument.
const G_FOO = 'aeiou';                  //Googlon special letters
const G_INV = 'z';                      //Preposition invalidator
const G_PREP = 3;                       //Preposition size
const G_VERB = 8;                       //Verb size
const G_ORDER = 'qnbczxjtklmvhrwfsdgp'; //Letter ordering
const G_NUM_MOD = 4;                    //Pretty number divisor
const G_NUM_MAX = 526593;               //Pretty number minimum

$textB = explode(' ', file_get_contents($argv[1])); 
print 'Prepositions: '   .  count(array_filter($textB, 'is_prep')) . PHP_EOL;
print 'Verbs: '          .  count(array_filter($textB, 'is_verb')) . PHP_EOL;
print 'First Person: '   .  count(array_filter($textB, 'is_first_person_verb')) . PHP_EOL;
print 'Pretty Numbers: ' .  count(array_filter(array_unique($textB), 'is_nice')) . PHP_EOL;
print 'Vocabulary: '     .  implode(' ', gsort(array_unique($textB))) . PHP_EOL;

function is_prep($word) {
    return G_PREP == strlen($word) && false === stripos(G_FOO, substr($word, -1)) && false === stripos($word, G_INV);
}
function is_verb($word) {
    return strlen($word) >= G_VERB && false === stripos(G_FOO, substr($word, -1));
}
function is_first_person_verb($word) {
    return is_verb($word) && false === stripos(G_FOO, $word[0]);
}
function is_nice($number) { 
    $gnumber = as_decimal($number);
    return (int) bcmod($gnumber, G_NUM_MOD) === 0 && $gnumber >= G_NUM_MAX;
}
function normalize($word) {
    return strtr($word, G_ORDER, '0123456789abcdefghij');
}
function gsort(array $words) {
    usort($words, function($a, $b) { return strcasecmp(normalize($a), normalize($b)); });
    return $words;
}
function as_decimal($number) {
    return base_convert(strrev(normalize($number)), 20, 10);
}

Os operadores de algumas provas variam. Algumas usam foo pra predicados, algumas usam bar. O mesmo pra verbos. Revisem o código antes de rodar!

Gaigalas, ta aí um código em python com 10 linhas a menos: https://gist.github.com/2424838

Pouco legível mas funciona ;)