Discussion
If 324⊕289 = 35, 441⊕484 = 43, then 625⊕400 = ?
Answer: D
Correct answer: 45
The operation adds the square roots: \( \sqrt{324} + \sqrt{289} = 18 + 17 = 35 \) and \( \sqrt{441} + \sqrt{484} = 21 + 22 = 43 \). So \[ \sqrt{625} + \sqrt{400} = 25 + 20 = \mathbf{45} \]
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