January 2020
Problem of the Month

The Odometer Puzzle

Mr. P was driving in his Outback on I-25 when he noticed the odometer read 24,942 miles.
Being a mathematician, Mr. P observed that it was a palindrome, and then of course, he wondered when the next time the odometer would be a palindrome.
He didn't have to wait long because an hour and forty minutes later, the odometer showed a new palindromic number.

How fast was Mr. P driving in that hour and forty minutes?

Solution to the Problem:

The answer is 66 mph.

The next palidrome after 24942 is 25052.

So, Mr. P had traveled 110 miles in the hour and 40 minutes.

Divide 110 by 5/3 hours to get 66 mph.

Correctly solved by:

1. Ivy Joseph	Pune, Maharashtra, India
2. James Alarie	Flint, Michigan
3. Cassidy Henrie	Mountain View High School, Mountain View, Wyoming
4. Kelly Stubblefield	Mobile, Alabama
5. Ev and Brina	Maryland
6. Marianna Zingone	Chatham High School, Chatham, New Jersey
7. Brijesh Dave	Mumbai City, Maharashtra, India
8. Jonathan Punke	Joliet Central High School, Joliet, Illiniois
9. Tyler Petersen	Mountain View High School, Mountain View, Wyoming

Send any comments or questions to: David Pleacher