Question:The value of `(9^2 xx 18^4)/3^16` is : 

A `2/3` 
B `4/9` 
C `16/81` 
D `32/243` 

+ Answer
C 

+ Explanation
`(9^2 xx 18^4)/3^16`

`= ((3^2)^2 xx (3 xx 3 xx 2)^4)/3^16`

`= (3^4 xx 3^4 xx 3^4 xx 2^4)/3^16`

`= (3^12 xx 2^4)/3^16`

`= 2^4/3^4`

`= 16/81`.

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Irin Moni

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