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Each of these items has question followed by two statements. As the answer, mark

a. if the questions can be answered with the help of both the statements but not with the help of either statement itself.

b. if the question can not be answered even with the help of both the statements.

c. if the question can be answered with the help of statement $II$ alone

d. if the question can be answered with the help of statement $I$ alone

What is the number $x$ if

I. The LCM of x and 18 is 36.

II. The HCF of x and 18 is 2.

1. If the questions can be answered with the help of both the statements but not with the help of either statement itself.
2. If the question can not be answered even with the help of both the statements.
3. If the question can be answered with the help 0 statement $II$ alone
4. If the question can be answered with the help of statement $I$ alone

We know, HCF * LCM = x * y

$\therefore$ 2 * 36 = x * 18

So, x = 4

We need both the statements to get a unique value of x as HCF of 8 and 18 is also 2 but their LCM is not 36.

Also, either of them alone won't suffice.

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