document.write( "Question 1010367: How many odd 4-digit numbers are there (repetition is allowed)? \n" ); document.write( "
Algebra.Com's Answer #625777 by Alan3354(69443)\"\" \"About 
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How many odd 4-digit numbers are there (repetition is allowed)?
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\n" ); document.write( "If leading zeroes are allowed, eg 0001, there are 10000 total numbers.
\n" ); document.write( "If not, it's 1000 to 9999 = 9000 and half of them are odd.
\n" ); document.write( "--> 4500
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