Six friends, A, B, C, D, E and F, are standing in a row. B is exactly between F and D. E is exactly between A and C. A is not a neighbour of D or F. C is not a neighbour of D.
How many persons are standing between D and A?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 4
“Exactly between” means next to both. So the six friends form two blocks of three, and the only question is which ends of the blocks meet.
B is between F and D: one block is F, B, D (in either order)
E is between A and C: the other block is A, E, C (in either order)
Where the blocks meet, an end of one block (A or C) stands next to an end of the other (F or D)
A is not a neighbour of D or F, so A cannot be at the meeting point: C is
C is not a neighbour of D, so the person next to C is F
The row is A, E, C, F, B, D (or the same read from the other end), so A and D are at the two ends
The persons between them are E, C, F and B: 4
