The teacher of Confucius, the confused soul, told him: "my age a two digit number is not prime but odd and if you reverse the digits of my age and add that number to my age , you obtain a number that is a perfect square. if you reverse the digits of my age and subtract the number from my age you again have a perfect square.the age of Confucius teacher was a number divisible by

7, 9, 13, 15

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