Simple Interest & compound interest

lav wrote:if the compound interest on a certain sum for 2 years is 21. What could be the simple interest ??
a) 20 B)16 C) 18 D)20.5

OA after some discussion

IMO A.

That is the only one giving a integer for the capital.

A=100x+40x=21.100 x=15

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lav: Master | Next Rank: 500 Posts; Posts: 116; Joined: Wed Feb 18, 2009 4:06 am; Thanked: 6 times

by lav » Sat Aug 08, 2009 4:48 am

hi
thanks for quick response
the ans is correct
can u pls explain the method of solving more

Kid in Verbal

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