Data Sufficiency Practice Test 1

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Directions (21−30) : In the following questions, each question is followed by two Statements I and II.
Mark (1) if Statement I is alone sufficient, but Statement II alone is not sufficient to answer the questions;
Mark (2), if Statement II alone is sufficient, but Statement I alone is not sufficient to answer the question;
Mark (3), if both Statements I and II, together are sufficient, but neither statement alone is sufficient to answer the question;
Mark (4), if both Statements I and II together are not sufficient to answer the question.

Question : 25 of 45

Marks: +1, -0

What is the value of

x_1

? You are given

x_1, x_2,x_3

and

x_4

as real numbers.
I.

x_2 − x_1 = 100 − (x_3 + x_4)

.
II.

x^2 + x^4 = 20 − x^3.

Validate

Solution:

As per Statement I,

(x_2 + x_3+ x_4) = (100 + x_1)

and as per Statement II,

(x_2 + x_4 + x_3) = 20

; therefore, the answer is (4).

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