If (9)3 is subtracted from the square of a number, the answer so obtained is 567. What is the number? 

(a) 36 (b) 28 (c) 42 (d) 48 (e) None of these

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1 Answers

(a) Let the required number be x
x2 – (9)3 = 567
x2 = 567 + 729 = 1296

 x = 1296 = (36)2 = 36

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