>Who Is the Engineer? – The Solution

>Last Monday, I posted a puzzle and solicited readers to submit the solution. Several readers responded and all of them solved the puzzle correctly. If you were unable to solve the puzzle, today I offer the solution.

First, let me post the puzzle again.

Who Is the Engineer?

On a train, Smith, Robinson and Jones are the fireman, brakeman and engineer, but NOT respectively. Also, aboard the train there are three businessmen who have the same names: a Mr. Smith, a Mr. Robinson and a Mr. Jones.

1. Mr. Robinson lives in Detroit.

2. The brakeman lives exactly halfway between Chicago and Detroit.

3. Mr. Jones earns exactly $20,000 per year.

4. The brakeman’s nearest neighbor, one of the passengers, earns exactly three times as much as the brakeman.

5. Smith beats the fireman at billiards.

6. The passenger whose name is the same as the brakeman’s lives in Chicago.

Who is the Engineer?

The Solution

A. Since Smith beats the fireman at billiards (5), Smith must be either the brakeman or the engineer.

B. The brakeman, who lives halfway between Chicago and Detroit (2), also lives near the neighbor who earns three times as much as he does.

C. The neighbor cannot be Mr. Robinson because Mr. Robinson lives in Detroit.

D. The neighbor cannot be Mr. Jones because Mr. Jones’ $20,000 a year (3) is not divisible by three.

E. Therefore, the brakeman’s neighbor must be Mr. Smith.

F. The passenger whose name is the same as the brakeman’s lives in Chicago.

G. He cannot be Mr. Robinson because Mr. Robinson lives in Detroit (1). He cannot be Mr. Smith because Mr. Smith lives between Chicago and Detroit (E).

H. Therefore, the passenger’s name is Mr. Jones.

I. Therefore, the brakeman’s name is also Jones.

J. Since Smith beats the fireman at billiards, so the fireman must be Robinson.

The Engineer is Smith.

Claude Mariottini
Professor of Old Testament
Northern Baptist Seminary

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2 Responses to >Who Is the Engineer? – The Solution

  1. Anonymous says:

    >Dear Dr. Mariottini,I am a former Northern student who recently graduated. During my time at Northern a number of students had some serious concerns about Northern and the political pressure that was being exerted upon the faculty and administration by outside individuals. Based on your earlier blogs, I understand that you have written the report for ATS. Will this report be made available to any alumni, student, supporter or church that wishes to see it? Thank you for your response.

    Like

  2. >Dear Friend,The final Self-Study Report has been written and a copy is available in the library. Anyone can read the Report and ask questions about the content of the Report.The Vising Team will be on campus on November 5-7 and as an alumnus of the Seminary, you are welcome to meet with them. The Visiting Team will be meeting with faculty, members of the Board of Trustees, staff, students, and alumni. If you desire to be one of the former students who will be meeting with the Visiting Team, let me know, and I will be glad to include your name to the list of alumni who will meet with the visitors.Thank you for visiting my blog.Claude Mariottini

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