perplexus.info :: Just Math : 5-digit number

5-digit number (Posted on 2018-01-02)

When you add the digit 1 at the end of this number you get a number thrice the number with 1 added before it.

Evaluate this number.

No Solution Yet Submitted by Ady TZIDON

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assuming beforehand that the title is meaningful

Comment 2 of 2 |

We're assuming the answer is a 5-digit number:

10x + 1 = 3(100000+x)

7x = 300000-1 = 299999

x = 42857

Posted by Charlie on 2018-01-02 13:31:46

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