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Questions › JNU › JNU SSS 2013 › Q12
1 mark, −0.25Mathematics › Logic and proof techniques › Logical reasoning puzzlesModerateabout 2 min

JNU SSS 2013 Question 12: Logic and proof techniques

An exclusive club is trying very hard to pick its members from the social elite. An exact election mechanism has been agreed upon that will ensure the entrance of only the most suave members from the group AAA, BBB, CCC, DDD, EEE, FFF, GGG and HHH. Being ‘in’ or ‘out’ of the club is determined by the following rules : If AAA is in, then GGG is out. If HHH is out, then BBB is in. If DDD is out, then EEE is out. If HHH is in, then CCC is in. If BBB is out, then GGG and DDD are out.

If EEE and GGG are in the club, then what other two people must also be in the club?

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Plain-text version

An exclusive club is trying very hard to pick its members from the social elite. An exact election mechanism has been agreed upon that will ensure the entrance of only the most suave members from the group A, B, C, D, E, F, G and H. Being ‘in’ or ‘out’ of the club is determined by the following rules: If A is in, then G is out. If H is out, then B is in. If D is out, then E is out. If H is in, then C is in. If B is out, then G and D are out. If E and G are in the club, then what other two people must also be in the club? (A) B, A (B) G, H (C) H, D (D) D, B

Logic and proof techniques has come up 73 times in 3 exams since 2004.

What this question tests

This question is on Logical reasoning puzzles, part of Logic and proof techniques in Mathematics.

Deduction problems that ask what must follow from a set of constraints.

TestStop has 47 past-paper questions on this subtopic.

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Question from the JNU SSS 2013 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.