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2 Find the HCF of 4 x 27 x 3125 , 8 X 9 x 25 x 7 and 16 x 81 x 5 x 11 x 49 .
A. 180
B. 360
C. 540
D. 1260
See Answer & Explanation Lets Discuss
Correct answer is : A
Explanation

 22 x 33 x 55 ,

23 x 32 x 52 x 7 ,

24 x 34 x 5 x  11 x 72  

To Find the HCF, We have to take the common Prime factors,

here 2, 3 are common and their common powers are:

22 , 32 and 5 .so the HCF is 4 x 9 x 5= 180

 

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