CRACK THE CODE · GRADE 7
Redstone Logic Codebreaker
Determine the numerical value of each Minecraft ore block by solving the algebraic equations to find the four-digit passcode.
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 -9 to 20 (some are negative!). A number in front of a shape means multiply: 2 stars = 2 x star. A small 2 after a shape means square it: star^2 = star 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+=
- 2.+×=CODE 1
- 3.3−2+=
- 4.−=CODE 2
- 5.+=
- 6.+×=CODE 3
- 7.+=
- 8.−−=CODE 4
- 9.×−=
- 10.2−=
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 obsidian-reinforced vault door.
Show answer key (for grown-ups)
Key: square = 1 · heart = -7 (hidden) · cross = -4 · ring = -8 (hidden) · triangle = 13 (hidden) · pentagon = 15
Every symbol is a whole number from -9 to 20 (some are negative!).
Vault code: 5997