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Mike's integer and maintaining order

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Kelsey writes A 6-digit integer. Mike copies the integer but places the units digit first, maintaining the order of the remaining five, (ex. 123,456 becomes 612,345). If Mike's integer is 5 times as Kelseys, what is Mike's integer?

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Solution Summary

Mike's integer is established.

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OK, let x be the integer, and a be its last digit. So, x looks like this

bcdefa

Now, how Mike obtain his integer from x? He took the last digit and moved it to the first place. It's equivalent to:

1) subtracting a from x: then the ...

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