Question 1
6 tasks (A, B, C, D, E, F) are to be completed one after the other. The following conditions must be met:
- Task E must be performed immediately after Task F.
- Task B must be completed before Task D.
- Task A is neither the first nor the last task to be completed.
- Task A is performed exactly 4 positions after Task D.
Which task is scheduled in the second position?
Step-by-step solution (Deductive Logic):
1. Apply Consecutive Constraint: 'E immediately after F' -> (F, E)
2. Apply Before Constraint: 'B before D'
3. Apply Exclusion Constraint: 'A not first or last'
4. Apply Gap Constraints: 'A is 4 after D'
Final Sequence: B → A → C → F → E → D
Answer: The task in the second position is A.
Key Strategy: Use fixed pairs and gap constraints to anchor positions.
1. Apply Consecutive Constraint: 'E immediately after F' -> (F, E)
2. Apply Before Constraint: 'B before D'
3. Apply Exclusion Constraint: 'A not first or last'
4. Apply Gap Constraints: 'A is 4 after D'
Final Sequence: B → A → C → F → E → D
Answer: The task in the second position is A.
Key Strategy: Use fixed pairs and gap constraints to anchor positions.