StringMash.com

Free printable puzzle packs

Ready-made code-breaking sheets to print, free, each pack with its own answer key.

How the packs work

Each pack is a set of puzzle sheets with the key on the page, followed by one answer key for the whole set. Press Print this pack and only that pack prints, a sheet to a page, on A4 or US Letter, in black and white. They're free to print and copy for a class, a club or a party.

Want different messages? The escape room puzzle maker makes a sheet from any message in the same style, and the cryptogram maker turns any sentence into a cryptogram.

Classroom escape room: five clues

Five sheets, each pointing to where the next one is hidden. The last gives the password. It takes a class working in teams about 30 to 45 minutes.

  • Print a set per team, and keep sheet 1 to hand out at the start.
  • Hide sheet 2 under your desk, sheet 3 in a red book on the shelf, sheet 4 behind the clock and sheet 5 by the door.
  • Change the hiding places to suit your room, and make matching sheets with the escape room puzzle maker.

5 sheets and an answer key, A4 or US Letter.

Clue 1

Name:

Each shape is the part of the grid that holds a letter. Match the shapes to the key.

'

Pigpen key

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Made at stringmash.com/printable-puzzle-packs

Clue 2

Name:

Each group of dots and dashes is one letter. Use the Morse code key to read them.

.-..-------.-..-......-...-......-..-..-...-------.-----.-..............-....-.

Morse code key

A .-B -...C -.-.D -..E .F ..-.G --.H ....I ..J .---K -.-L .-..M --N -.O ---P .--.Q --.-R .-.S ...T -U ..-V ...-W .--X -..-Y -.--Z --..
Made at stringmash.com/printable-puzzle-packs

Clue 3

Name:

Each number is a letter's place in the alphabet: 1 is A, 2 is B, 26 is Z.

38531125891442085312119191815151331215311

A1Z26 key

A 1B 2C 3D 4E 5F 6G 7H 8I 9J 10K 11L 12M 13N 14O 15P 16Q 17R 18S 19T 20U 21V 22W 23X 24Y 25Z 26
Made at stringmash.com/printable-puzzle-packs

Clue 4

Name:

Each pair of numbers is a row and a column in the square. Find the letter where they meet. I and J share a square.

44231531114344133145152443125444231514343442

Polybius square: row, then column

12345
1ABCDE
2FGHIK
3LMNOP
4QRSTU
5VWXYZ
Made at stringmash.com/printable-puzzle-packs

Clue 5

Name:

Every letter has been moved along the alphabet by the same number of places. Move each one back to read the message.

AOLWHZZDVYKPZLZJHWL

Shift: each letter moved forward 7 places.

Made at stringmash.com/printable-puzzle-packs

Classroom escape room: five clues: answer key

  1. Clue 1: THE NEXT CLUE IS UNDER THE TEACHER'S DESK
  2. Clue 2: LOOK INSIDE THE RED BOOK ON THE SHELF
  3. Clue 3: CHECK BEHIND THE CLASSROOM CLOCK
  4. Clue 4: THE LAST CLUE IS BY THE DOOR
  5. Clue 5: THE PASSWORD IS ESCAPE

Setting up

  • Print a set per team, and keep sheet 1 to hand out at the start.
  • Hide sheet 2 under your desk, sheet 3 in a red book on the shelf, sheet 4 behind the clock and sheet 5 by the door.
  • Change the hiding places to suit your room, and make matching sheets with the escape room puzzle maker.
Made at stringmash.com/printable-puzzle-packs

Maths code-breakers

Five codes, each hiding a maths fact, from shapes to prime numbers. They work as a starter, a plenary or homework.

5 sheets and an answer key, A4 or US Letter.

Shapes

Name:

Each number is a letter's place in the alphabet: 1 is A, 2 is B, 26 is Z.

185241715148119199241994519

A1Z26 key

A 1B 2C 3D 4E 5F 6G 7H 8I 9J 10K 11L 12M 13N 14O 15P 16Q 17R 18S 19T 20U 21V 22W 23X 24Y 25Z 26
Made at stringmash.com/printable-puzzle-packs

Times tables

Name:

Each pair of numbers is a row and a column in the square. Find the letter where they meet. I and J share a square.

43155115334424321543152422234424432124214454432453

Polybius square: row, then column

12345
1ABCDE
2FGHIK
3LMNOP
4QRSTU
5VWXYZ
Made at stringmash.com/printable-puzzle-packs

Angles

Name:

Each pair of numbers is a row and a column in the grid, as a prisoner would tap them on a wall. C and K share a square.

1,14,22,42,22,34,41,13,32,23,11,52,44,33,32,43,31,54,45,41,41,52,24,21,51,54,3

Tap code grid: row, then column

12345
1ABCDE
2FGHIJ
3LMNOP
4QRSTU
5VWXYZ
Made at stringmash.com/printable-puzzle-packs

Time

Name:

Every letter has been moved along the alphabet by the same number of places. Move each one back to read the message.

YMJWJFWJXNCYDRNSZYJXNSFSMTZW

Shift: each letter moved forward 5 places.

Made at stringmash.com/printable-puzzle-packs

Primes

Name:

Every letter has been swapped for a different one, the same way all through. Use the letters you already know to work out the rest.

HAUQRCAPEJMANPEQRGHAIPEFHAEWXTWOLVHAEWLQRI

No key: that's the puzzle. Start with short words and repeated letters.

Made at stringmash.com/printable-puzzle-packs

Maths code-breakers: answer key

  1. Shapes: A HEXAGON HAS SIX SIDES
  2. Times tables: SEVEN TIMES EIGHT IS FIFTY SIX
  3. Angles: A RIGHT ANGLE IS NINETY DEGREES
  4. Time: THERE ARE SIXTY MINUTES IN AN HOUR
  5. Primes: A PRIME NUMBER HAS EXACTLY TWO FACTORS
Made at stringmash.com/printable-puzzle-packs

Halloween code-breakers

Five spooky messages in five different codes, from easy pigpen to a tricky cryptogram.

5 sheets and an answer key, A4 or US Letter.

The cat

Name:

Each shape is the part of the grid that holds a letter. Match the shapes to the key.

Pigpen key

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Made at stringmash.com/printable-puzzle-packs

At the door

Name:

Each group of dots and dashes is one letter. Use the Morse code key to read them.

-.-...-.-.-.----.-.-.-...--

Morse code key

A .-B -...C -.-.D -..E .F ..-.G --.H ....I ..J .---K -.-L .-..M --N -.O ---P .--.Q --.-R .-.S ...T -U ..-V ...-W .--X -..-Y -.--Z --..
Made at stringmash.com/printable-puzzle-packs

Upstairs

Name:

Every letter has been moved along the alphabet by the same number of places. Move each one back to read the message.

WKHJKRVWLVLQWKHDWWLF

Shift: each letter moved forward 3 places.

Made at stringmash.com/printable-puzzle-packs

Midnight snack

Name:

The alphabet has been turned back to front: A is Z, B is Y, C is X. Swap each letter back.

KFNKPRMKRVZGNRWMRTSG

Atbash key

A ZB YC XD WE VF UG TH SI RJ QK PL OM N
Made at stringmash.com/printable-puzzle-packs

The cauldron

Name:

Every letter has been swapped for a different one, the same way all through. Use the letters you already know to work out the rest.

WTGHPEOCWTEGHIWTCQIGHPEQNQPEONTWTGHPEXCYGHWTLVWTGHPEVMXXALLJ

No key: that's the puzzle. Start with short words and repeated letters.

Made at stringmash.com/printable-puzzle-packs

Halloween code-breakers: answer key

  1. The cat: BEWARE THE BLACK CAT
  2. At the door: TRICK OR TREAT
  3. Upstairs: THE GHOST IS IN THE ATTIC
  4. Midnight snack: PUMPKIN PIE AT MIDNIGHT
  5. The cauldron: THE WITCH STIRS HER BREW BY THE LIGHT OF THE FULL MOON
Made at stringmash.com/printable-puzzle-packs

Questions

Are the packs really free?

Yes. Print them and copy them for a class, a club or a party.

Can I change the messages?

Not in a pack, but the escape room puzzle maker makes sheets from any message in the same style.

Do I need colour ink?

No. Every sheet prints in black and white.

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