Question

Find the smallest evan number that contains every digit once

Answer 1

• The smallest even number that contains every digit once is 1023456798.

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Conditions we need to meet:

• Use every digit once,
• Even number,
• Smallest possible number.

To get the smallest number we'd use all 10 digits in the ascending order:

• 0123456789

Here we can't have zero in the beginning as the number becomes 9-digit.

So swapping zero with the closest digit, 1.

Our number should be even, so we should swap 9 with one even digit.

Again it should be the closest one to 9, so it is 8.

We get the following number as a result:

• 1023456798

To test you may swap digits, any number you get will be greater than this number.