The father of this boy Gigon is an excavating engineer. In the garden of this boy's house, there is a rectangular ditch. The problem was chosen to favour Gigon.
11 seconds sound clip from the Mr. Topaze (1961) movie soundboard.
You can hear this line at 00:37:57 in the Blu-ray version of the movie.
Quote context
[...]
- Do you deny that there is a boy of the name of Gigon in your class?
- No, madam, I would not deny there is a boy of that name.
- What is his father's profession?
- Madam, I can vouch for the complete integrity of my colleague.
- I hope that I can believe you.
- But I will not believe that my grandson was bottom of the class!
- Will not believe he was bottom of the class
[...]