Question 1
Five friends A, B, C, D, and E are standing in a single row facing North. i) D is exactly in the middle of the row. ii) A is not at any end. iii) C is to the immediate left of E. iv) B is at one of the ends. v) A is to the immediate right of D. Who is standing at the left end?
From (i), D is at position 3. From (v), A must be at position 4. (iii) places C and E as consecutive with C left of E at positions 1 and 2. (iv) puts B at the remaining end, position 5. Final order: C E D A B. Left end is C.