Skn1608 wrote:

Is X a positive integer?

(1) x>0

(2) x^2+16=25

the original answer is C.

I'm confused why the answer is not A. I know that zero is define as neither negative or positive, but based on the inequality symbol, the zero (0) should not be included?

That's why I thought statement (1) alone is sufficient.

Please expert help.

Thanks in advance

Would like to pitch in,

(1) x>0

If x> 0, this just tells about the sign of x, Now x can be a fraction, number or an integer, Example x can be

x=1, is an Integer(Answering the question as Yes)

x = 1.1, is not an Integer (Answering the question as No)

(2) x^2+16=25

x^2 = 9

will give 2 values, x can be

3(Answering the question as Yes)

-3(Answering the question as No)

Now when you combine both the statements, you know that x>0 and from B, the only value which satisfies both the statements is 3.

Giving Answer as C

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