What are the six possible ways to arrange 123456789 into a multiplication problem?

Answer 1

I am delighted to say that there are actually nine ways! 12 x 483 = 5796 42 x 138 = 5796 18 x 297 = 5346 27 x 198 = 5346 28 x 157 = 4396 39 x 186 = 7254 48 x 159 = 7632 4 x 1738 = 6952 4 x 1963 = 7852 I wrote some javascript (don't know any other programming codes!) to come up with the first seven. It was little more than a search through the various permutations, with only a few shortcuts. (It would be interesting if anybody could think of a neater way of finding the solutions.) I overlooked the last two - Henry Ernest Duden takes sole credit for them. The list is exhaustive - there are no other solutions.