Hi,

the digits a,b,c,d are the form:

10^3*a+10^2*b+10*c+d

Because all digits cann take the I, II, III or IV position, there are 24 number (24= 1*2*3*4, permutations).

Add together this 24 numbers, and see...

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- October 8th 2012, 01:35 AM #1

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- October 8th 2012, 04:44 AM #2

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