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
a) 20 B)16 C) 18 D)20.5
OA after some discussion
Kid in Verbal 
IMO A.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
That is the only one giving a integer for the capital.
A=100x+40x=21.100 x=15
