Difficulty: Medium
Correct Answer: 9 > 5 > 4 - 18 + 9 > 16
Explanation:
Introduction / Context:
This is an operator-replacement reasoning problem. Each symbol must be replaced consistently, then the resulting arithmetic statement is checked for truth. Such questions test attention to detail, operator precedence, and careful translation.
Given Data / Assumptions:
Concept / Approach:
Translate each option using the mapping, simplify the left side, and check whether the comparison (or equality) is true.
Step-by-Step Solution:
(A) 13 > 7 < 6 + 2 = ^ 4 → 13 + 7 − 6 ÷ 2 < × 4 (ill-formed because “=<×4” yields a comparison against a missing left factor).
(B) 9 > 5 > 4 − 18 + 9 > 16 → 9 + 5 + 4 = 18 ÷ 9 + 16.
Compute LHS: 9 + 5 + 4 = 18. RHS: 18 ÷ 9 + 16 = 2 + 16 = 18. Statement is true.
(C) 9 < 3 < 2 > 1 x 8 ^ 2 → 9 − 3 − 2 + 1 > 8 × 2 → 5 > 16 (false).
(D) 28 + 4 ^ 2 = 6 ^ 4 + 2 → 28 ÷ 4 × 2 < 6 × 4 ÷ 2 → 14 < 12 (false).
Verification / Alternative check:
Re-evaluate (B) carefully with precedence to confirm both sides equal 18. Others either become false or malformed.
Why Other Options Are Wrong:
Common Pitfalls:
Mixing symbol roles, ignoring that “−” denotes equality, and losing operator precedence while simplifying.
Final Answer:
9 > 5 > 4 - 18 + 9 > 16
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