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Mathematics, 30.09.2019 00:30 mallyosburn
Mark can remember only the first 4 digits of his friends phone number. he also knows that the number has 7 digits and that the last digit is not a 0. if mark were to dial all of the possible numbers and if it takes him 21 seconds to try each one, how long it take to try every possibility
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Mark can remember only the first 4 digits of his friends phone number. he also knows that the number...
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