24 lines
549 B
PHP
24 lines
549 B
PHP
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<?php
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$sum = [];
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for($n = 10; $n <= 99; $n++)
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{
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for($d=$n+1;$d <= 99; $d++)
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{
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foreach([1,2,3,4,5,6,7,8,9] as $digit)
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{
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$ns = (int)str_replace($digit, '', $n);
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$ds = (int)str_replace($digit, '', $d);
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if($n != $ns && $d != $ds && $d != 0 && $ds != 0)
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{
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if($n/$d == $ns/$ds)
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{
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echo "$n/$d = $ns/$ds\n";
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$sum[] = $ns/$ds;
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}
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}
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}
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}
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}
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echo array_product($sum).PHP_EOL;
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