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Q.

Find the LCM of 28, 36 and 60.


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a

1260

b

1160

c

1360

d

1460 

answer is A.

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Detailed Solution

Concept- We will first write the three numbers supplied in terms of prime number multiplication in order to determine the LCM, and then we will group the common numbers. The remaining ungrouped numbers will then be multiplied by one number taken from the group.
Identify the prime factors of the supplied numbers in order to multiply the given numbers by them in order to discover the solution.
Prime factors of 28:
Question ImagePrime factors of 36
Question ImagePrime factors of 60
Question ImageQuestion ImageThus the LCM of Question ImageHence, the correct answer is option 1.
 
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