Question:The L.C.M. of `2^3``xx``3^2``xx`5`xx`11, `2^4``xx``3^4``xx``5^2``xx`7 and `2^5``xx``3^3``xx``5^3``xx``7^2``xx`11 is: 

A `2^5``xx``3^4``xx``5^3` 
B `2^5``xx``3^4``xx``5^3``xx``7^3``xx`11 
C `2^3``xx``3^2``xx`5`xx`7`xx`11 
D `2^3``xx``3^2``xx`5 

+ Answer
B 

+ Explanation
solution:
L.C.M. =product of highest powers of prime factors
          =`2^5``xx``3^4``xx``5^3``xx``7^2``xx`11.

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Md. Habib Ullah

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