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How do you solve the perfect 15 square?

Updated: 10/17/2024
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βˆ™ 13y ago

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15 = 1252 + 20(1*5) = 125 + 100 = 225

or

15*15 = 15*10 + 10*15/2 = 150 + 75 = 225

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βˆ™ 13y ago
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Q: How do you solve the perfect 15 square?
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