document.write( "Question 729777: Hello, having issues with this question, please help\r
\n" ); document.write( "\n" ); document.write( " Using the digits 0 – 9, find out how many 4 digit passcodes (Like 0056 or 3984) can be configured based on the stated conditions.\r
\n" ); document.write( "\n" ); document.write( " The passcode must begin with an odd digit and end with an even digit. (Repetition OK)\r
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Algebra.Com's Answer #446231 by fcabanski(1391) $\"\"$ $\"About$

You can put this solution on YOUR website!
Since digit one must be odd, it can only be 1,3,5,7 or 9. That means there are 5 possible digits for the first digit.

\n" ); document.write( "Digit two and three can be any digit from 0-9, so each one has 10 possible digits.

\n" ); document.write( "Since digit four must be even, it can only be 0,2,4,6,8. That's 5 possible digits for the fourth digit.

\n" ); document.write( "Since the digits can repeat, you can multiply the number of possible digits for each place.

\n" ); document.write( "5*10*10*5 = 2500 possible 4-digit passcodes. \n" ); document.write( "

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