15 added to the square of a number is 6 less than the square of itssuc – InterviewSolution

1.

15 added to the square of a number is 6 less than the square of itssuccessor. Find the number7.

Answer»

let the number be X.According to question, X ² +15 = (X +1)² -6

=>X ² +15 = X²+2X+1-6

=> 2X = 20=> X = 10

Hence, the number is 10=

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