Question 12
Four boxes contain one item each: a red pencil, a green pencil, a blue pen and a black pen. Their labels say:
- Box 1: This box does not contain the red pencil.
- Box 2: The blue pen is in either Box 1 or Box 3.
- Box 3: The black pen is in Box 1.
- Box 4: This box contains the green pencil.
Boxes containing pens have true labels; boxes containing pencils have false labels. Which box contains the blue pen?
- Box 1: This box does not contain the red pencil.
- Box 2: The blue pen is in either Box 1 or Box 3.
- Box 3: The black pen is in Box 1.
- Box 4: This box contains the green pencil.
Boxes containing pens have true labels; boxes containing pencils have false labels. Which box contains the blue pen?