CRACK THE CODE · GRADE 3
The Redstone Cryptograph
Determine the secret number values of the sword, pickaxe, potion, and redstone dust symbols to solve the equations and find the four-digit security code.
Each shape stands for a number. Work out the missing ones first, then solve the shape equations and read off the 4-digit code. Do it here or print the sheet — the answer key comes with it.
The key
Every symbol is a whole number from 1 to 12. A number in front of a shape means multiply: 2 stars = 2 x star.
Find the missing values
Some shapes in the key are missing. Use these equations to work them out, then write them into the key. Take them in order.
Crack these
- 1.×+=
- 2.++=CODE 1
- 3.×=
- 4.10+=CODE 2
- 5.5−=
- 6.×=CODE 3
- 7.×−=
- 8.×−=CODE 4
- 9.2+=
- 10.10+=
The vault code
Take the ones digit of your answers to problems 2, 4, 6, 8 (the ones tagged CODE 1–4), in that order. That opens the reinforced obsidian chest.
Show answer key (for grown-ups)
Key: square = 12 · cross = 9 · triangle = 7 (hidden) · hexagon = 11 · lightning bolt = 2 · diamond = 10 (hidden)
Every symbol is a whole number from 1 to 12.
Vault code: 3036