Skip to Main Content

PrepTest 78, Game 1, Question 4

Kevin Lin
Lesson by Kevin Lin
Magoosh Expert
Summary
The analysis of PT 78 Game 1, Question 4, reveals a strategic approach to solving a local question by incorporating new information and applying logical deductions based on the given rules.
  • A new piece of information specifies that T is not a project member, prompting the need for a new local diagram.
  • The exclusion of T, based on the rules, necessitates the exclusion of S as well, due to their interconnected conditions.
  • Exploration of possibilities based on the remaining rules helps identify that at least one of Q or R must be excluded.
  • Analyzing the implications of including or excluding W leads to the conclusion that X must always be included, making answer choice E correct.
  • Process of elimination further validates that X is the only option that must be included, as excluding it leads to a contradiction.
Chapters
00:00
Introduction to Local Diagrams
00:22
Rule Application and Deductions
00:37
Strategic Exploration of Possibilities
03:01
Determining the Necessary Project Member