Q267
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 ?
A.
48
B.
Cannot be determined
C.
13
AnswerD.
38
Answer: Option C
Solution
Answer: Option C
Solution:
Let the given number be xAccording to the question,
x2 - 25 = (x - 25)2
x2 - 25 = x2 + (25)2 - 50x
x = 13