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GMAT Problem Solving (PS) | Re: What is the remainder when 1271 * 1275 * 1277 *1285 is divid

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I tried doing this exercise the following way but it seems I do not get the same result.. So obviously I am doing something wrong. Could somebody possible tell me why this is not correct?

I just used the last 2 digits of each number as these would be the most important

So: 71*75*77*85.

The last 2 digits are 25, this means that 12 still goes twice into this number. With 1 remaining.
Is this exercise simply not solved by doing this or am I doing it completely wrong?

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