Daily Olympiad: Logical Reasoning - Puzzles [20260706]

Solution

Correct: C

From the clues: A is the mother of D and E (so D and E are children). F is the brother of D, implying F is the child of A. B is A's brother-in-law, so B must be the brother of A's spouse. C is neither a child nor a spouse. Since A has at least one child (D/E) and a spouse (B's relation implies), the only remaining role for C is to be the father of E, aligning with option C.

Solution

Correct: C

Positioning: B is third. From left to right: positions 1,2,3,4,5. C cannot be 1 or 5. D is adjacent to C. E is right of A. If E is to the right of A (A _ E), possible positions for E are 2-5. Try A in 1: E in 2. But B (position 3) is fixed. Then C and D must fit in 4 and 5, violating adjacency. Try A in 2: E in 3 (but B occupies 3). Invalid. A in 4: E in 5. C and D must fit in 1-2. C not at end (position 1). So C in 2, D in 1. Thus, D is at far left. Correct.