perplexus.info :: Numbers : A number well defined

A number well defined (Posted on 2018-10-25)

Half of my 2-digit number N is also a 2-digit number,
one of its digit being the sum of N's digit, the other their difference.
All 4 digits are different.

Find my number.

See The Solution Submitted by Ady TZIDON

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re(2): Too much information

Comment 5 of 5 |

(In reply to re: Too much information by Ady TZIDON)

algebraic ... /...there is only one solution....

Not so:

6,8 fits the equation as well, but does not meet other requirements e.g. one-digit sum

I agree

Posted by Steve Herman on 2018-10-27 15:46:16

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