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Jagadeesh1210on Math puzzle for Vietnamese eight-year-olds

PHP program to solve this puzzle. <?php while(1) { $numbers = '123456789'; $numStringLength = strlen($numbers); $num1=$numbers[rand(0, $numStringLength - 1)];

$numbers=str_replace($num1,'',$numbers); $numStringLength = strlen($numbers); $num2=$numbers[rand(0, $numStringLength - 1)];

$numbers=str_replace($num2,'',$numbers); $numStringLength = strlen($numbers); $num3=$numbers[rand(0, $numStringLength - 1)];

$numbers=str_replace($num3,'',$numbers); $numStringLength = strlen($numbers); $num4=$numbers[rand(0, $numStringLength - 1)];

$numbers=str_replace($num4,'',$numbers); $numStringLength = strlen($numbers); $num5=$numbers[rand(0, $numStringLength - 1)];

$numbers=str_replace($num5,'',$numbers); $numStringLength = strlen($numbers); $num6=$numbers[rand(0, $numStringLength - 1)];

$numbers=str_replace($num6,'',$numbers); $numStringLength = strlen($numbers); $num7=$numbers[rand(0, $numStringLength - 1)];

$numbers=str_replace($num7,'',$numbers); $numStringLength = strlen($numbers); $num8=$numbers[rand(0, $numStringLength - 1)];

$numbers=str_replace($num8,'',$numbers); $numStringLength = strlen($numbers); $num9=$numbers[rand(0, $numStringLength - 1)];

$sum=$num1+13$num2/$num3+$num4+12$num5-$num6-11+$num7*$num8/$num9-10;

if($sum == 66) echo "Math Puzzle Answer String::".$num1.$num2.$num3.$num4.$num5.$num6.$num7.$num8.$num9."||Sum::".$sum."\n"; }

Jagadeesh1210on Programmatically solve this Vietnamese math problem for kids

<?php while(1) { $numbers = '123456789'; $numStringLength = strlen($numbers); $num1=$numbers[rand(0, $numStringLength - 1)];