11

What is the minimum possible 4-digit integer of the form x x y y \overline{xxyy} which is a multiple of 11 and when divided by 11, gives another multiple of 11 with x y = 1 x-y=1 ?


The answer is 6655.

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1 solution

Archisman Pathak
Jun 15, 2015

dividing XXYY by 11 gives X0Y therefore X+Y=11 given X-Y=1 solving the two equations we get x=6 , y=5

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