perplexus.info :: Just Math : Last Digit II

Last Digit II (Posted on 2014-03-14)

Can the last digit in the base ten expansion of X^2X be 4, whenever X is a positive integer?

If so, give an example. If not, prove it.

See The Solution Submitted by K Sengupta

Rating: 5.0000 (1 votes)

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re: Answer

Comment 3 of 3 |

(In reply to Answer by Math Man)

Great answer, MM!

Exactly what I had !!

I will link up this solution in place of my official solution very soon!!!

Edited on September 2, 2022, 10:31 pm

Posted by K Sengupta on 2022-09-02 22:31:07

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