Posted by Enzo on Tuesday, June 19, 2012 at 9:15am.
I am a six digit number. Two of my digits have the values 300 and 4000. All the digits in my thousands are the same. The remaining digits are also the same and their sum is the 10.

Math  Steve, Tuesday, June 19, 2012 at 10:26am
nn43xx
if all the thousands are the same,
4443xx
If x+x=10, x=5, so
444355