A set of numbers has the property that for any number t in the set,t+3 is in the set. If -2 is in the set, which of the following must also be in the set? I. -3 II. 1 III. 4	Pick one.
A) I,III only
B) III only
C) II only
D) II,III only
E) I only
question is asking for must be there elements.   According to the question if t is there t+3 must be there.   if -2 is the starting element the sequence is as follows.   S ={-2,1,4,7,10....}   if -2 is not the starting element the sequence is as follows   S = {...-5,-2,1,4,7,10...}   By observing the above two sequences we can say that 1,4 must be there in set S.   Answer : II,III only
<result>D</result>
A set of numbers has the property that for any number t in the set,t+3 is in the set. If -2 is in the set, which of the following must also be in the set? I. -3 II. 1 III. 4