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