A woman and her husband frequently go walking together. On one particular day, however, they walked side by side, one never getting ahead of the other. They walked for an hour. At the end of the hour, the woman says, "That felt good. I think I walked four miles. The husband responds, "Oh, I walked much farther than that. I'm sure I walked five or six."
How could that be?
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[ Car Talk Puzzler ]