Free Logic Puzzles with Answers (Printable)

Three complete puzzles on this page, all from a detective case file: one 3×3 logic grid and two coded notes. Every answer is below the puzzle it belongs to, including the reasoning. Hit Ctrl+P (Cmd+P on Mac) if you want them on paper. No download, no email, no sign-up.

How to use this page: solve on screen or print. The answer blocks are collapsed — tap to open one when you are done or stuck. Printing keeps the answers visible on the page, so if you are running this for a group, fold the bottom of the sheet over first. For a table of people, the printable Halloween party games run on the same print-and-play rules.

Puzzle 1 — Logic Grid: The Stakeout

Three detectives caught three suspects. Each suspect owns exactly one pet and drives exactly one vehicle, and no two match. Work out who owns what from the four clues.

CatHamsterParrotScooterTruckVan
Detective Ana
Detective Ben
Detective Cal
  1. Detective Ana caught the suspect who owns the cat.
  2. Detective Ben drove the scooter that night.
  3. The detective who drives the van caught the parrot owner.
  4. Detective Cal did not drive the scooter and did not catch the cat owner.

Question: for each detective — which pet owner did they catch, and what does that detective drive?

Answer + reasoning (tap to reveal)

Ana owns the cat and drives the truck. Ben owns the parrot. Cal owns the hamster and drives the van.

Reasoning: clue 1 gives Ana the cat. Clue 2 puts Ben in the scooter. Clue 3 needs a van-driving detective who caught the parrot owner; Ben drives the scooter and clue 4 keeps Cal off the cat owner (already Ana's), so the van belongs to Cal. That leaves the truck for Ana. Clue 3 then puts the parrot with Ben, leaving Cal the hamster.

Puzzle 2 — Caesar Cipher: The Note

A coded note was found in the suspect's desk. The hint: each letter was shifted forward through the alphabet by the same amount, and spaces stayed where they were. Decode it.

AOL NBPSAF WHYAULY MSLD UVYAO HA KHDU
Answer + reasoning (tap to reveal)

Decoded: THE GUILTY PARTNER FLEW NORTH AT DAWN (shift 7).

Method: short words give the shift away. The two-letter word AOL appears once, and a two-letter word shifted by the same amount every time is a good anchor — try shifts until AOL becomes a real word: a shift back of 7 turns A→T, O→H, L→E, giving THE. Apply 7 to the whole line.

Puzzle 3 — Atbash Cipher: The Confession

A second note used a substitution: A becomes Z, B becomes Y, C becomes X, and so on through the alphabet (each letter mapped to its mirror). Decode it.

GSV GSRVU PMVD GSV ZOZIN XLWV ZOO ZOLMT
Answer + reasoning (tap to reveal)

Decoded: THE THIEF KNEW THE ALARM CODE ALL ALONG.

Method: with Atbash you can decode from either end — the cipher alphabet is the plain alphabet reversed. G is the 7th letter from the start, so it becomes the 7th from the end: T. S (19th) mirrors to H, V (22nd) mirrors to E. GSV = THE, and the rest follows the same swap.

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one-time · 20 logic grids, 15 ciphers, 10 witness matches, 10 timelines, 5 final cases · full keys + reasoning · A4 + US Letter PDF