The directors of a museum are mounting an exhibition of paintings in a space temporarily partitioned into exactly seven rooms- R, I, C, U, L, M and N. Visitors reach room R by an elevator, and they can enter and leave the exhibition only through room R. Once inside, visitors are free to move as they choose from room to room. The following list includes all of the doorways that connect the seven rooms: There is a doorway between R and I, a doorway between R and C, and a doorway between R and L. There is a doorway between I and C. There is a doorway between L and U and a doorway between L and M. There is a doorway between M and N. Which of the following is a room that a visitor must enter before entering room U?


1) I 2) C 3)L 4)M

• R------I
  R------C
  I-------C
  R-------L
  L--------U
  L--------M
  M-------N
  SO THE PATH WILL BE R------L-------U
• 9 years agoHelpfull: Yes(8) No(0)
• L
  There is only 1 door in
  U room which is come from room L
  
  
• 9 years agoHelpfull: Yes(3) No(0)
• the person enters in the room R from the elevator . in order to enter in to room U he should find the path from R-U there is only one way from the given data that is through room L. so the sequence is
  R-L-U. answer is L
• 9 years agoHelpfull: Yes(2) No(2)
• | |
  M-L-R-C
  | | | |
  N U I
  Hence answer is L
• 8 years agoHelpfull: Yes(1) No(0)
• Answer: 3) L
• 9 years agoHelpfull: Yes(0) No(0)
• he can enter in room u only through room l
• 9 years agoHelpfull: Yes(0) No(1)
• 3) L
  
  R-I
  R-L
  R-C
  ---------------
  I-C
  L-U
  L-M
  ----------
  L-M
  M-N
  The only way to reach U is Start from R->L->U
  So, visitor must enter before entering room U is L
  
• 8 years agoHelpfull: Yes(0) No(0)
• in the given data:
  a doorway between R and L, L and U.
  visitor can enter the room U in only one way
  R--L then L--U.
  so,
  ans=L
• 8 years agoHelpfull: Yes(0) No(0)
• c is compulsory
  
• 8 years agoHelpfull: Yes(0) No(0)
• only one way to enter in room U using L
  so,answer is L
  
• 8 years agoHelpfull: Yes(0) No(0)
• L as there is a way from R->L->U
  So the answer is L
• 8 years agoHelpfull: Yes(0) No(0)