The even numbers in this set are:
210, 550
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If repetition is allowed . . . . . 343 If repetition is not allowed . . . . . 210
If they can be repeated, 343 different numbers. If they can be used once each, there are only 210.
1 and 343 are two numbers that do.
1, 7, 49, 343.
They are 7 times 49 = 343