On a shelf are placed six volumes side-by-side labelled A, B, C, D, E and F. B, C, E, F have green covers while others have yellow covers. A, D, B are new volumes while the rest are old volumes. A, C, B are law reports while the rest are medical extracts.
Which two volumes are old medical extracts and have green covers ?
Answer: D. E, F
Green Cover
Yellow Cover
New Volume
Old Volume
Law Reports
Medical Extracts
A
X
X
X
B
X
X
X
C
X
X
X
D
X
X
X
E
X
X
X
F
X
X
X
Clearly, E and F are old volumes which have green covers and are medical extracts.