This question says that two windows have exactly two colors of glass. It seems like a hard question, so I skipped it at first. I eliminated two answers, then left it and came back after the final question.
I do this sometimes on “brute force” questions. I can disprove answers faster once I’ve finished other questions and developed a better sense of the game.
A and D were the two answers I eliminated. Both violate rule 4: every window needs at least one of purple or orange.
The only way I know how to choose between the remaining answers is to make scenarios to disprove or prove those answers.
Note: The vertical lines in these scenarios indicate the group is full. Remember, the question says that two of the groups only have two. And the letters mentioned in the answer are a complete list of what’s in that window.
This scenario proves that B is CORRECT.
This is what I drew to eliminate C:
I’ve placed GP (which is always in one group) and OP (which is in the answer) fills window two. Now we have two groups left to place:
YP
Two R’s
YP can’t go with either green or orange, so they must go in group three. That leaves us no space to put both R’s, since this question says two windows must have only two colors.
I drew the incomplete diagram above to show you what I actually drew to eliminate this question.
E has the exact same problem. Here’s green and orange in the second group:
Once again, there’s no space to put YP and both R’s without having more than two colors in two groups.
If you have trouble following either of those eliminations, draw the diagrams yourself, and try to place YP and both R’s while keeping in mind the new rule for this question.
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