2004 AIME I Problems/Problem 6
Problem
An integer is called snakelike if its decimal representation satisfies
if
is odd and
if
is even. How many snakelike integers between 1000 and 9999 have four distinct digits?
An integer is called snakelike if its decimal representation satisfies
if
is odd and
if
is even. How many snakelike integers between 1000 and 9999 have four distinct digits?
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