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Earn +20 ptsQ: What do you get when you multiplay 123456789 by 123456789?
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How do you find the radius of a hemisphere if you know the volume?
123456789
What is a 123456789-sided polygon?
it has so many sides it looks like a circle.
What are the six possible ways to arrange 123456789 into a multiplication problem?
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.
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