E E O
+ E O O
O E O E
- The above alphanumeric equation uses each of the digits from 0 to 9 exactly once.
- O denotes an odd digit and E denotes an even digit. Zero is considered as an even digit.
- Each digit in the top row is greater than the digit immediately below it.
(In reply to re: corrected and solved
You claim: "Solutions are 423+675, 425+673, 623+475, 625+473, all summing to 1098 .
None of the above fulfills the condition 3: digit 2 is above 7 and 2<7.
With no constraints there would exist 2^3=8 solutions.