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Forum: Questions About Logic-Puzzles.org 03-23-2018, 05:11 PM
Replies: 2
Views: 1,196
Posted By zenobia43
Your grid shows that SBC = Tuesday. Now...

Your grid shows that SBC = Tuesday.

Now restate clue 7 by substituting Tuesday for SBC and reverse the inequality so it is easier to compare to clue 1.

7. The show that aired on Tuesday had...
Forum: Questions About Logic-Puzzles.org 12-29-2017, 04:24 AM
Replies: 2
Views: 2,427
Posted By zenobia43
With that negative relation for $40/Isaac already...

With that negative relation for $40/Isaac already in the grid, we know immediately that $40 has to be paired with orange.

Once that positive relation was established, normal transposing would fill...
Forum: Puzzle Baron's Logic Puzzles - The Book! 12-26-2017, 04:09 AM
Replies: 32
Views: 125,938
Posted By zenobia43
According to this post,...

According to this post, http://www.logic-puzzles.org/forum/showthread.php?p=4089#post4089, there is probably a missing negative relation. Using the suggested modification will lead to a solution.
Forum: Questions About Logic-Puzzles.org 07-06-2017, 08:07 AM
Replies: 4
Views: 3,615
Posted By zenobia43
If you have never solved a logic puzzle before,...

If you have never solved a logic puzzle before, start with the 3x4 Easy puzzles. With only three categories and only four options in each category, the logic chains are relatively short - and after a...
Forum: Comments, Bugs and Feature Requests 06-10-2017, 03:24 PM
Replies: 2
Views: 2,565
Posted By zenobia43
This one is tricky because you have to do a...

This one is tricky because you have to do a substitution in the third clue before the hint makes sense.

Before the substitution:

Clue 3: helmet -> yellow
Clue 10 : orange -> flower
...
Forum: Logic Puzzles and Brain Benders 05-04-2017, 08:13 AM
Replies: 1
Views: 1,799
Posted By zenobia43
I put the position category on the left, and I...

I put the position category on the left, and I put the distance as the last category on the right. I got the following solution. I'm not sure if it is unique, but it seems to satisfy the clues - as...
Forum: Questions About Logic-Puzzles.org 04-04-2017, 05:12 PM
Replies: 10
Views: 6,985
Posted By zenobia43
A trivial 3x3 puzzle

Here is a trivial 3x3 puzzle built using the technique described in the previous posts.

I started with the identity matrix in each of the upper 3x3 sub-grids, and labeled the columns the way I...
Forum: Questions About Logic-Puzzles.org 04-04-2017, 09:05 AM
Replies: 10
Views: 6,985
Posted By zenobia43
Puzzle construction

Yes, and since you can permute the columns when you have found a suitable constraint set (the clues), then always start with the identity matrix (true relationships in a straight line from upper left...
Forum: Questions About Logic-Puzzles.org 04-03-2017, 08:49 AM
Replies: 10
Views: 6,985
Posted By zenobia43
More puzzle construction

Terri - As in the previous post, one could start with a pleasing set of clues (the constraint set) and test for a unique solution. As uigrad mentioned, if the solution is not unique, one could...
Forum: Questions About Logic-Puzzles.org 04-02-2017, 08:52 AM
Replies: 10
Views: 6,985
Posted By zenobia43
Puzzle construction

What a great question !

I'll give you my 2 cents worth. I'm sure someone will be kind enough to correct my math (logic) if I didn't get it right. It would be so great if one of our logic puzzle...
Forum: Comments, Bugs and Feature Requests 03-23-2017, 06:00 AM
Replies: 2
Views: 1,496
Posted By zenobia43
Suppose you had this clue: Of the essay...

Suppose you had this clue:

Of the essay written by Dr. Callahan and the one that was 10 pages long, one was about volcanos, and the other was in Chapter 4.

And suppose from your grid you...
Forum: Questions About Logic-Puzzles.org 03-07-2017, 07:32 AM
Replies: 16
Views: 8,871
Posted By zenobia43
There is a great tutorial here:...

There is a great tutorial here: http://logic-puzzles.org/how-to-solve-a-logic-puzzle.php, and it covers most of the techniques that you will need for the puzzles on this site.

Many have asked how...
Forum: Logic Puzzles and Brain Benders 02-22-2017, 03:30 AM
Replies: 6
Views: 7,071
Posted By zenobia43
If the puzzle is one from the...

If the puzzle is one from the https://www.geocaching.com site, could you post the geocache ID (e.g. GC3AM8C)?
Forum: Puzzle Baron's Logic Puzzles - The Book! 01-28-2017, 12:37 PM
Replies: 15
Views: 14,022
Posted By zenobia43
The only tutorial I know of is the one provided...

The only tutorial I know of is the one provided on this site, and the one we have been referencing in this thread.

If you encounter a puzzle that stumps you, enjoy the moment, and then if you...
Forum: Puzzle Baron's Logic Puzzles - The Book! 01-26-2017, 07:39 AM
Replies: 15
Views: 14,022
Posted By zenobia43
Sorry - I was one row off. Tuesday is the row...

Sorry - I was one row off. Tuesday is the row that is common to earthquakes and magnetism. So that is the row that will always be occupied by either earthquakes or magnetism, forcing the remaining...
Forum: Puzzle Baron's Logic Puzzles - The Book! 01-25-2017, 03:48 PM
Replies: 15
Views: 14,022
Posted By zenobia43
For the Music Store puzzle: The positive...

For the Music Store puzzle:

The positive relation from clue 6 can be substituted into clue 3 to deduce that Ricardo and $13.99 can only be Third or Fifth.

That will force First to be $9.99.
...
Forum: Puzzle Baron's Logic Puzzles - The Book! 01-25-2017, 03:12 PM
Replies: 15
Views: 14,022
Posted By zenobia43
For the Science Fair puzzle: Clue 3 says...

For the Science Fair puzzle:

Clue 3 says that Michigan and earthquake can only be Tuesday or Wednesday. So you can eliminate (X out) Monday, Thursday, and Friday for those options.

That will...
Forum: Puzzle Baron's Logic Puzzles - The Book! 01-24-2017, 06:20 AM
Replies: 15
Views: 14,022
Posted By zenobia43
Step 7 illustrates the transposition of false...

Step 7 illustrates the transposition of false relationships.

Step 8 introduces the positive relationship, pink == $40 out of thin air just to set up the next illustration which shows how to...
Forum: Questions About Logic-Puzzles.org 01-08-2017, 06:42 AM
Replies: 2
Views: 9,012
Posted By zenobia43
I tried doing this puzzle with a grid, but that...

I tried doing this puzzle with a grid, but that didn't help much.

I got the following solution after assuming that the Mango was the other yellow fruit:

7 - R - Pomegranate
6 - U - Orange
5...
Forum: Logic Puzzles and Brain Benders 12-06-2016, 05:06 AM
Replies: 1
Views: 9,047
Posted By zenobia43
I got the same solution shown in your grid.

I got the same solution shown in your grid.
Forum: Logic Puzzles and Brain Benders 11-30-2016, 09:36 AM
Replies: 12
Views: 11,917
Posted By zenobia43
I added witch and the pale pink color back and I...

I added witch and the pale pink color back and I added baron and white to make a total of 13 characters and 13 colors.

Here is the patterned version to make sure the constraints are met.

208
...
Forum: Logic Puzzles and Brain Benders 11-30-2016, 06:43 AM
Replies: 12
Views: 11,917
Posted By zenobia43
I don't think square grids with an even number of...

I don't think square grids with an even number of columns and rows can meet the three constraints. Try constructing a grid with two characters and two colors.

I got rid of the witch character and...
Forum: Logic Puzzles and Brain Benders 11-29-2016, 06:54 PM
Replies: 12
Views: 11,917
Posted By zenobia43
Assuming the constraints mentioned earlier, I...

Assuming the constraints mentioned earlier, I removed the orange assignments except for Mary and Jordan and tried to find an assignment for each color separately rather than trying to complete the...
Forum: Comments, Bugs and Feature Requests 11-26-2016, 02:05 PM
Replies: 1
Views: 4,308
Posted By zenobia43
We don't have much control over the points...

We don't have much control over the points awarded unless we set a new record or place way to the right of the normal curve.

Penalties add to the completion time which reduces the score, so if...
Forum: Comments, Bugs and Feature Requests 11-26-2016, 12:23 PM
Replies: 2
Views: 5,663
Posted By zenobia43
Both Yvonne and Carol didn't make a mistake on 11...

Both Yvonne and Carol didn't make a mistake on 11 down. The category can be confusing because it is errors rather than correct answers.
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