Example Logic Problem Puzzle

 
There are two common methods of solving logic problems. This page gives an example of a logic problem being worked out using the "table" or "fill-out grid" method. The other method can be called "ABC grid", "crosshatch grid" or simply "the grid method". For an example of this puzzle worked out using the grid method, click here.
 
 
Name Surname House No. Dog
       
       
       

Three people live in Hopper St. Can you sort out their names, house numbers & their dogs names?

Dogs: Bob, Patch, Toby

Names: Jim, Dick & Mike

Surnames: Black, Turnip & Spade

House No.s: 1,2,3

Clue 1. Dick lives at a higher number than Mr. Spade; neither of these own Bob.

Clue 2. Toby lives at No. 1

Clue 3. Jim Black does not live at No. 3

 
 
Clue 1 tells us that Dick, Mr Spade and Bob have no association with each other. We can therefore fill the table out with these 3 details:

Name Surname House No. Dog
Dick      
  Spade    
      Bob
 
 
Clue 3 tells us that Jim Black does not live at No. 3. There is only space for this person to fit in the table with Bob the dog:

Name Surname House No. Dog
Dick      
  Spade    
Jim Black   Bob
 
 
As there is only one space left in both the name and surname columns, we can now fill these in:

Name Surname House No. Dog
Dick Turnip    
Mike Spade    
Jim Black   Bob
 
 
Clue 3 tells us that either Dick or Mr. Spade lives at No. 3. Clue 1 tells us that Dick lives at a higher number than Mr. Spade and therefore:

Name Surname House No. Dog
Dick Turnip 3  
Mike Spade    
Jim Black   Bob
 
 
Back to clue 2: Toby lives at No. 1. There is only one place this can fit:

Name Surname House No. Dog
Dick Turnip 3  
Mike Spade 1 Toby
Jim Black   Bob
 
 
The table can now be completed:

Name Surname House No. Dog
Dick Turnip 3 Patch
Mike Spade 1 Toby
Jim Black 2 Bob


I hope the above makes sense to you all.

Any further questions or comments, please email The Logic Zone.
 
The Logic Zone
brain image