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8. Is x^2 greater than x ? (1) x^2 is greater than 1. (2) x is greater than –1

I dont agree with the OA.Please explain your answers. I will post the OA later.

I use the decision tree to solve DS questions as followed: - Is statement (1) alone is sufficient? Yes, ie. if x = 2 then x^2=4 > 2=x Then we eliminate answer choices: B, C, E. - Is statement (2) alone is sufficient? No, it isn't sufficient. Because if x>-1 then x^2 may be greater than x (-1<x<0 or x>1) or smaller than x (0<x<1). Then we eliminate D. The answer is A.

8. Is x^2 greater than x ? (1) x^2 is greater than 1. (2) x is greater than –1

I dont agree with the OA.Please explain your answers. I will post the OA later.

I use the decision tree to solve DS questions as followed: - Is statement (1) alone is sufficient? Yes, ie. if x = 2 then x^2=4 > 2=x Then we eliminate answer choices: B, C, E. - Is statement (2) alone is sufficient? No, it isn't sufficient. Because if x>-1 then x^2 may be greater than x (-1<x<0 or x>1) or smaller than x (0<x<1). Then we eliminate D. The answer is A.

Yes, ie. if x = 2 then x^2=4 > 2=x >>> x can be 2 or -2. -> suff 1 insuff

8. Is x^2 greater than x ? (1) x^2 is greater than 1. (2) x is greater than –1

I dont agree with the OA.Please explain your answers. I will post the OA later.

I feel that in such questions, plugging values directly is an easier option than solving/simplifying the equations. Just identify the boundary conditions and plug both sides.

Eg. For Stt1: Plug -2 and +1 => since it works for both. This is most probably sufficient. (You cannot be definite by plugging just 2 values. But a statement like this might be easy to visualise after 2 values have been plugged) For Stt2: Plug +0.5 and -0.5 => since it fails for one and works for the other, thus it is definitely insufficient.

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