1. "I've spent all day tracing one stupid mistake I made," declared Joe. "What did you do?" asked his wife. "Shifted the last two digits of a 5-figure number and wrote them before the other three," Joe replied. "And that was just one more or less than two-thirds of the correct number. I forget which." What was the number?

Joe's number was 48732

Joe's number was 47928

Joe's number was 497787