Question:The student was asked to multiply a given number by `8/17`.Instead ,he divided the given number by `8/17`.He answar was `225`more than the correct answar.The given number was : 

A `8` 
B `17` 
C `64` 
D `136` 

+ Answer
D 

+ Explanation
Let the given number be x.

`(x ÷ 8/17) - (x xx 8/17) = 225`

or ` (x xx 17/8) - (x xx 8/17)= 225`

or `(17x)/8 - (8x)/17 = 225`

or `289x - 64x`

`= 225 xx 136`

or  `x = (225 xx 136)/225`

`= 136`

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Irin Moni

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