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1.  

Directions (Q 46–50): Seven persons – A, B, C, D, E, F and G – live on the seven floors of a building, one on each floor; floor 1 is the lowest and floor 7 the top. A lives on an odd-numbered floor. Only two persons live between A and D. E lives on a floor above B. Each question gives two more statements; use them together with these facts and decide which statements are sufficient to answer it.

On which floor does A live?
I. D lives on floor 4.
II. D lives on an even-numbered floor below A.

Correct Answer: D [Both statements together are needed]

Explanation:

A is 3 floors from D and odd.

2.  
(Use the directions above – Data Sufficiency, Q 46–50)
Who lives immediately below E?
I. E lives on floor 7 and A lives on floor 3.
II. D lives on floor 6 and E lives above D.

Correct Answer: C [Either statement alone is sufficient]

Explanation:

I: A = 3 puts D on 6 (floor 0 does not exist), just below E.

3.  
(Use the directions above – Data Sufficiency, Q 46–50)
Does C live on a floor above F?
I. C lives on floor 2.
II. F lives on floor 1.

Correct Answer: B [Statement II alone is sufficient]

Explanation:

I: F may be on 1 or higher.

4.  
(Use the directions above – Data Sufficiency, Q 46–50)
How many persons live between B and G?
I. B lives on floor 1 and G lives on floor 5.
II. G lives on floor 5 and D lives on floor 4.

Correct Answer: A [Statement I alone is sufficient]

Explanation:

I: floors 2, 3 and 4 lie between – 3 (the base facts allow it: A = 7, D = 4).

5.  
(Use the directions above – Data Sufficiency, Q 46–50)
Who lives on floor 3?
I. G lives on an even-numbered floor.
II. C lives on a floor below G.

Correct Answer: E [Both statements together are not sufficient]

Explanation:

Even together, several persons can still be on floor 3.

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