What is the direction of Y with respect to X? I. X is south-west of Z. II. Y is north of Z. III. Additional info. Which statements are sufficient?

Statement II alone is sufficient.
Statement I and III together are sufficient.
Statement I and II together are sufficient.
Statement II and III together are sufficient.

Correct answer: Statement I and II together are sufficient.

Solution

Statement I: X is south-west of Z. Statement II: Y is north of Z. Together: if X=SW of Z and Y=N of Z, then Y is north-east of X. Both I and II together are sufficient to determine Y's direction from X.

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