The Grey Labyrinth is a collection of puzzles, riddles, mind games, paradoxes and other intellectually challenging diversions. Related topics: puzzle games, logic puzzles, lateral thinking puzzles, philosophy, mind benders, brain teasers, word problems, conundrums, 3d puzzles, spatial reasoning, intelligence tests, mathematical diversions, paradoxes, physics problems, reasoning, math, science.

   

Let's Eat!

Waffle House is on 1st Street. Eliza ate there for lunch on Friday and dinner on Monday.

Taco Marimba is on 2nd Street. Eliza ate there for lunch on Sunday and dinner on Saturday.

Chick-Empty-A is on 3rd Street. Eliza ate there Tuesday for lunch and Friday for dinner.


Idaho Fried Chicken is on 4th Street. Eliza ate there Thursday for lunch and Sunday for dinner.

Dice's Pizza is on 5th Street. Eliza ate lunch there on Saturday and dinner there on Tuesday.
 

Questionnos's is on 6th Street. Eliza ate lunch there on Monday and dinner there on Wednesday.


Long John Bronze's is on 7th Street. Eliza ate there for lunch on Wednesday, and dinner on Thursday.

Well that's all well and good, but what's the logic? Read on, intrepid puzzler!

Eliza ate at Questionnos twice during the week (intro); this did not happen on Thursday, Friday, or Saturday (clue 8), so she ate there twice during the period from Sunday through Wednesday.

Since Eliza did not eat at any restaurant more than once during the period from Sunday through Tuesday (clue 8) or on Wednesday (intro), she ate at Questionnos once on Wednesday and once on Sunday, Monday, or Tuesday. Similarly, Eliza ate at the restaurant on 7th Street once on Wednesday and once on Thursday, Friday, or Saturday (clue 8, intro), and Questionnos is not the restaurant on 7th Street. Therefore, Eliza also ate at the restaurant on 6th street, which is Questionnos, on Wednesday (clue 1).

Since she ate there for lunch on Monday (clue 2), and since she ate at each restaurant once for lunch and once for dinner (intro), Eliza ate at Questionnos on Wednesday for dinner; therefore, she ate at the restaurant on 7th street on Wednesday for lunch.

Eliza ate at Long John Bronze's on two consecutive days (clue 4); one of these days must have been Wednesday (clue 8). Therefore Long John Bronze's must be the restaurant on 7th Street, where she ate dinner on Thursday, and not Tuesday (clue 8).

Eliza didn't eat dinner at the restaurant on 5th Street on Sunday, Friday, or Saturday (clue 5) or Monday (clue 1), so it was on Tuesday, and she ate lunch at the restaurant on 1st street on Friday (clue 5).

Eliza ate at Chick-Empty-A on Tuesday and Friday (clue 3), and since dinner on Tuesday and lunch on Friday were at different restaurants, she ate at Chick-Empty-A for lunch on Tuesday and dinner on Friday.

Chick-Empty-A cannot be the restaurant on 1st Street, 2nd Street (clue 1), 4th Street (clue 1), or 5th Street, so it is on 3rd Street.

Eliza did not eat at the restaurant on 4th Street on Sunday for lunch (clue 6), nor did she eat at the restaurant on 1st Street; therefore, she ate at the restaurant on 2nd Street (clue 8).

She did not eat on the restaurant on 1st Street on Sunday for dinner (clue 1), so she ate at the restaurant on 4th Street, and she ate dinner at the restaurant on 1st Street on Monday (clue 8) and at the restaurant on 2nd Street on Saturday.

The day on which Eliza ate at Dice's Pizza and Taco Marimba must be Sunday or Saturday (clue 7); since Dice's Pizza is on an odd-numbered street, Eliza ate there for lunch on Saturday, and it is located on 5th Street (clue 8), while Taco Marimba is on 2nd Street.

By elimination, Eliza ate lunch at the restaurant on 4th Street on Thursday; this restaurant isn't Waffle Habitat (clue 6), so it is Idaho Fried Chicken, and Waffle Habitat is on 1st Street.
3.20 stars. Votes are updated daily.


On a scale of 1 to 5, 1 being among your least favorite, 5 being among your most favorite, how would you rate this puzzle?

1 2 3 4 5

Copyright © 1996-2014 Wx3, All Rights Reserved.