angeldevil5173 angeldevil5173

01-11-2017
Mathematics

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If each digit can be any number from 0 to 9 how many different credit numbers are possible

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jamiemin007 jamiemin007

01-11-2017

There are 16 digits in a credit card number, you know, xxxx xxxx xxxx xxxx
So any number 0-9 can be those digits. There are 10 numbers 0-9, including 0, so you would do 10^16, since numbers can be repeated.

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