sequence

Jan 2008
173
1
Z W Y X

The sequence above may be changed in either of two ways . either two adjacent letters may be interchanged or the entire sequence may be reversed . what is the least number of such changes needed to put the letters into alphabetical order from left to right ?

A 2 b 3 c 4 d 5 e 6
 
May 2010
6
0
Z,W,Y,X
the answer would be B)3 times
Z,W,Y,X
to Z,Y,W,X
to Z,Y,X,W
then flip letter order to W,X,Y,Z

if i read right that should work
 
May 2010
43
3
Norman, OK
Z,W,Y,X
the answer would be B)3 times
Z,W,Y,X
to Z,Y,W,X
to Z,Y,X,W
then flip letter order to W,X,Y,Z

if i read right that should work
Yes, and while other sequences of moves are possible, three is the minimum since W has to be switched at least twice to move it to the end opposite to Z.