anceer wrote:
After an attempted breakout at Folsom State Prison, the warden lines the prisoners up for a headcount. (Assume the warden counts correctly and that no prisoners switch positions or leave/escape during either headcount.) When the warden counts from left to right, Gurby is the 20th prisoner counted, but when the warden counts from right to left, Gus is the 20th prisoner counted. How many prisoners are lined up for the headcount?
(1) There are 13 prisoners between Gurby and Gus.
(2) The total number of prisoners is odd
st.1 here two cases are possible.
case 1) total number of prisoners = 25
in this case gurby will be at position 20 (from left to right) and gus will be at position 6 (from right to left). and the total number of prisoners between them will be 13
1-----gus----------------gurby---------25
case 2) total number of prisoners =53
1------------------------gurby----------------------gus-------------------------53
hence statement 1 alone is not sufficient.
statement 2: clearly not sufficient.
combining 1 and 2
still not sufficient as total number of prisoners can be 25 and 53. hence answer should be E