<?php
for($c=0; $c<=52; $c++)
for($b=0; $b<=52; $b++) {
$a = $b*$c;
if($a != $b && $a != $c && $b!=$c && $b+$a == 52)
printf("a=%2d b=%2d c=%2d<br>", $a, $b, $c);
}
?>
----------------------------------------------------------
a=39 b=13 c= 3
a=48 b= 4 c=12
a=50 b= 2 c=25