Q.

The LCM of smallest two digit composite number and smallest composite number is


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a

12

b

Question Image

c

20

d

44  

answer is C.

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Detailed Solution

Concept-As we all know about integers,  LCM is the least positive integer  divisible by a given integer. For example, an LCM with (4,5) = 20. Find the integers and find their LCM. It is also known that  composite numbers are numbers with a small divisor other than 1 and that number. For a given question, you can calculate the LCM by getting the number of the given  composite number and  finding the factor.
As you know, it is the smallest two-digit composite number, and the smallest composite number is 4 .   By prime factorization, we get:
Question Image Therefore, the LCM consists of the smallest two-digit composite number and the smallest composite number.
 Hence, the correct option is 3.
 
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