1.

If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ?

Answer»

124



Let the NUMBER be X 
THEREFORE, x² - (83)² = 8487
x² = 8487 + (83)²
x² = 8487 + 6889
x²= 15376
Therefore, x² = 15376



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