CRACK THE CODE · GRADE 3
Redstone Lock Code Breaker
Solve the block equations to find the four-digit combination that unlocks the obsidian chest.
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.×=
- 2.5−=CODE 1
- 3.3−=
- 4.5−=CODE 2
- 5.×+=
- 6.++=CODE 3
- 7.×−=
- 8.++=CODE 4
- 9.×=
- 10.3−=
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 treasure chest.
Show answer key (for grown-ups)
Key: pentagon = 4 (hidden) · lightning bolt = 9 (hidden) · square = 2 · triangle = 6 · star = 11 · ring = 12
Every symbol is a whole number from 1 to 12.
Vault code: 8850