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Question
A certain amount of money has been invested to earn a simple interest of 10% per annum. The interest earned every year is again invested at the same rate. After how many years will the amount become the square of itself?
Options:
A .  12
B .  8
C .  7
D .  10
E .  can't be determined
Answer: Option E
:
E
Unless we know the amount we cannot derive the answer.
Hence option (e)

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