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MAA AMC
AMC 8
2008 AMC 8
5
5
Part of
2008 AMC 8
Problems
(1)
AMC 8 2008 Problem 5
Source:
11/28/2010
Barney Schwinn notices that the odometer on his bicycle reads
1441
1441
1441
, a palindrome, because it reads the same forward and backward. After riding
4
4
4
more hours that day and
6
6
6
the next, he notices that the odometer shows another palindrome,
1661
1661
1661
. What was his average speed in miles per hour?
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16
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18
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20
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<span class='latex-bold'>(A)</span>\ 15\qquad <span class='latex-bold'>(B)</span>\ 16\qquad <span class='latex-bold'>(C)</span>\ 18\qquad <span class='latex-bold'>(D)</span>\ 20\qquad <span class='latex-bold'>(E)</span>\ 22
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22