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How many different numbers are obtainable from five 5s by first concatenating some of the 5s, then multiplying the results?

 Jul 31, 2021
 #1
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Not sure what you are asking, but maybe

5 x 5

5 x 55

5 x 555

5 x 5555

55 x 55

55 x 555

 Jul 31, 2021
 #2
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the rest of the problem reads: For example, we could obtain 5 x 55 x 55, 555 x 55, or 55555, but not 5 x 5 or 2525. I'm confused too

Guest Jul 31, 2021

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