perplexus.info :: Numbers : What's Going On?

What's Going On? (Posted on 2005-07-05)

How do you explain the following addition problems?

      87678          185634
    + 43125        +  86257
    -------        --------
    1821784           62872

See The Solution Submitted by Bractals

Rating: 3.0000 (3 votes)

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solution

| Comment 3 of 5 |

This works if we're adding in base -9. Nice problem.

Posted by josh on 2005-07-06 02:23:21

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