25% of (? + 360) = 15 × \sqrt{100}

Correct answer: 240

Solution

We have 25% of (? + 360) = 15 × \sqrt{100}. Since \sqrt{100} = 10, the right side becomes 150. Then 25% = 1/4, so (? + 360)/4 = 150, giving ? + 360 = 600 and ? = 240.

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