Answer:Investigative
Explanation: According to Holland, there are six personality types which include: Realistic, Investigative, Artistic, Social, Enterprising, and Conventional.
Our interest here is the Investigative type of personality individuals who use abstract and logic intelligently to solve problems. These individuals in this group love to work independently and enjoy puzzle- like challenges that employ critical thinking and intellect, making them love the maths and sciences and mostly end up in professions like Computer scientist, doctors, mathematicians etc
Here Jack who loves solving problems chief personality type according to Holland is likely to be Investigative.
