document.write( "Question 1046565: When the natural numbers 1,2,3,....,500 are written, then the digit 3 is used n times in this way.find the value of n ? \n" ); document.write( "
Algebra.Com's Answer #662017 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
The occurances of the digit 3 are:
\n" ); document.write( "3, 13, 23, 30-32, 33, 34-39, 43, 53, 63, 73, 83, 93,
\n" ); document.write( "103, 113, 123, 130-132, 133, 134-139, 143, 153, 163, 173, 183, 193,
\n" ); document.write( "203. . . . .
\n" ); document.write( "303. . . . .
\n" ); document.write( "403. . . . . 493
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\n" ); document.write( "This is the 1st line repeated 5 times
\n" ); document.write( "I count 20 3's in the 1st line
\n" ); document.write( "\"+5%2A20+=+100+\"
\n" ); document.write( "Then I have to add 300 through 399 extra 3's on the 4th line
\n" ); document.write( "That's \"+100+\" more 3's
\n" ); document.write( "\"+100+%2B+100+=+200+\"
\n" ); document.write( "\"+n+=+200+\" is my guess
\n" ); document.write( "You should get a 2nd opinion on this, however\r
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