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2014-08-21T02:02:24+05:30

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Let us say the number is AB
Its value is 10A + B

Given A+B = 12  --- equation 1

     AB - BA = 36  that means  10A+B - (10B+A) = 36
     9 A - 9 B = 36             
     A - B = 4              equation 2

Now add equation 1 and equation 2

2 A +B - B = 12+4 = 16

So A = 8                Using equation1, we find B = 4

Given number is 84 and reverse number is 48

1 5 1