While solving a problem, by mistake, Anita squared a number and then subtracted 25 from it rather than first subtracting 25 from the number and then squaring it. But she got the right answer. What was the given number ?
Options:
A . 48
B . Cannot be determined
C . 13
D . 38
Answer: Option C Let the given number be x According to the question, x2 - 25 = (x - 25)2 x2 - 25 = x2 + (25)2 - 50x x = 13
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