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Mathematics, 03.01.2021 16:00 nolangriffin
Alan has forgotten his 4-digit PIN code.
He knows the first digit is 9 and the last digit is larger than 5.
How many different sets of 4 digits could it be?
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Answers: 2
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Alan has forgotten his 4-digit PIN code.
He knows the first digit is 9 and the last digit is larger...
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