<?php

include 'core/connect.php';

$num = 3;
$page = $_GET['page'];
$result = mysql_query("SELECT COUNT(*) FROM articles ORDER BY id DESC");
$temp = mysql_fetch_array($result);
$posts = $temp[0];
$total = (($posts - 1) / $num) + 1;
$total =  intval($total);
$page = intval($page);
if(empty($page) or $page < 0) $page = 1;
if($page > $total) $page = $total;
$start = $page * $num - $num;   
    
$result = mysql_query("SELECT * FROM articles ORDER BY id DESC LIMIT $start, $num");

?>
<?php while($arr = mysql_fetch_array($result, MYSQL_NUM))

arr[0],arr[1] и так до 10...

  { ?>