Tricky Test 2 Level 42

Overview

This level presents a logic puzzle: "You are getting engaged. Your fiance has hidden the engagement ring. If only one statement is true, where's the ring?" Three boxes are shown, each with a statement:

• Box A: "The ring is in this box."
• Box B: "The ring is not in this box."
• Box C: "The ring is not in box A."

By testing each possible location against the constraint that exactly one statement is true, the only consistent answer is Box B.

• Difficulty: Hard
• Estimated moves: 1 selection

Step-by-Step Solution

1. Read the puzzle: "You are getting engaged. Your fiance has hidden the engagement ring. If only one statement is true, where's the ring?"
2. Write down the three statements:

• Box A: "The ring is in this box."
• Box B: "The ring is not in this box."
• Box C: "The ring is not in box A."

1. Test if the ring is in Box A: A's statement is true, B's statement is true (the ring is not in B), and C's statement is false. That gives 2 true statements, which violates the rule.
2. Test if the ring is in Box B: A's statement is false, B's statement is false (the ring IS in B), and C's statement is true. That gives exactly 1 true statement. This is consistent.
3. Test if the ring is in Box C: A's statement is false, B's statement is true, and C's statement is true. That gives 2 true statements, which violates the rule.
4. Only Box B yields exactly one true statement. Tap/select Box B to reveal the ring and complete the level.

Strategy & Reasoning

The puzzle is a classic truth-teller logic problem. The rule is that exactly one of the three statements must be true. If the ring were in A, then both A and B would be true (two truths), which is invalid. If the ring were in C, then both B and C would be true (two truths), which is also invalid. Only if the ring is in Box B do you get exactly one true statement: A is false, B is false, and C is true. This unique consistency makes Box B the correct location. The puzzle rewards systematic case-testing rather than guessing.

Tips & Common Mistakes

• Mistake: choosing Box A because its statement sounds self-evident. Correct: if the ring were in A, then both A and B would be true (2 truths), violating the rule.
• Mistake: choosing Box C. Correct: if the ring were in C, then both B and C would be true (2 truths), also invalid.
• Mistake: not testing all three cases. Correct: only Box B yields exactly one true statement (C true, A and B false).
• Mistake: guessing without logic. Correct: walk through each box and count how many statements become true; only B gives exactly one.