Problem Solving (PS) | Re: † and ¥ represent nonzero digits, and (†¥)² - (¥†)²

First number is 10*x+y --> Its square is 100*x^2+y^2+20xy
2nd number is 10*y+x -->its square is 100*y^2+x^2+20xy

100*x^2+y^2+20xy - 100*y^2+x^2+20xy =99(x^2-y^2)

Only number divisible by 99 in the option is E
ANS:E

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