One person, one of each
In Logic grids, three people each have one item from each of two categories. No item is shared. Here, Ana, Ben and Cal each have a different drink and a different pet.
A clue that says Ana did not drink tea rules out that pair. It does not tell you whether she drank juice or cocoa.
Use a small grid on paper or with Pencil. Cross out an impossible pair. When only one drink remains for someone, that drink cannot belong to either of the other people.
Carry a match into the other category
Use tea, juice and cocoa once each, and cat, parrot and tortoise once each.
- Ana did not drink the tea.
- Ana did not drink the juice.
- Ben did not drink the juice.
- The one who drank the tea keeps the cat.
- The one who drank the juice keeps the parrot.
Ana cannot have tea or juice, so she has cocoa. Ben cannot have juice or Ana's cocoa, so he has tea. Cal has the remaining drink, juice.
Now use the linked clues: Ben has the cat, Cal has the parrot, and Ana has the remaining pet, the tortoise.
Use the same method on new clues
This is a new arrangement. Again, each person has a different drink (tea, juice or cocoa) and a different pet (cat, parrot or tortoise).
- Ana did not drink the cocoa.
- Ana did not drink the tea.
- Cal did not drink the tea.
- The one who drank the cocoa keeps the cat.
- The one who drank the tea keeps the parrot.
Find the drinks first. Then follow the clue that connects a drink with the cat.
Try it
Who keeps the cat?
- Ana
- Cal
Show the answer
Cal
Cal has cocoa: Ana must have juice, and Cal cannot have tea. The clue links cocoa with the cat, so Cal keeps the cat. Ben has tea and the parrot.
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