use 6 of the digits from 1 to 9 to make each number. use each digit only once.

a) the greatest possible even number

would 987654 do it?

987,654

(3w)^9+2=81

987654

To find the greatest possible even number using 6 digits from 1 to 9, we need to consider the place value of the digits. The greatest possible even number is formed by arranging the digits in descending order from left to right, while ensuring that the last digit is even.

Here are the steps to find the greatest possible even number:

1. Start with the digits 9, 8, 7, 6, 5, and 4 (since we need to use each digit only once).
2. Arrange the digits in descending order: 9, 8, 7, 6, 5, 4.
3. Check the last digit (4 in this case). If it is odd, we need to find the next even digit. In this case, 4 is even, so we can proceed.
4. Combine the digits: 987654.
5. This forms the greatest possible even number using the given digits: 987,654.

Therefore, the greatest possible even number using the digits 1 to 9, using each digit only once, is 987,654.