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Four Digit Odd Even

Posted: January 8, 2024

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There are two four-digit numbers that have the following unique properties: The four-digit numbers have the digits arranged odd-even-odd-even; If you double either of the 4-digit numbers, all of the digits of the new numbers are even; and if you halve either of the 4-digit numbers, only the final digit of the newly formed four-digit numbers is even. Find the smaller of these two four-digit numbers.

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