Question

Someone explain me how to do B, the question makes no sense to me

Answer 1

Answer:

3

Step-by-step explanation:

because 3 is only not common in the given numbers

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Answer 2

Answer:

LCM of two numbers is nothing but the lowest common multiple of those two numbers, that is, the factors of LCM has both the numbers as it's factors.

Here in this example

LCM is 2*2*3*5*5*7*7

First no is 2*2*5*5*7

The other lowest number possible is 3*7 which is a factor of LCM and covering all its prime factors.

Ans: 3*7