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a cube = s.o.d . (Posted on 2017-06-15)

I've found a four-digit number ABCD such that
ABCD=(A+B+C+D)³

What is it ?

Is it unique?

No Solution Yet Submitted by Ady TZIDON

Rating: 3.0000 (2 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

re: Paper & Pencil solution (spoiler)

| Comment 2 of 3 |

Excellent reasoning!

You rate me 3, and I rate you 6!

However, 512 is not a 4-digits number - no need to post disclaimers!

Both 17,18 as answers were known to me, however I've considered disclosing the "neighboring" feature as counterproductive...

Posted by Ady TZIDON on 2017-06-15 11:16:23

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