CRACK THE CODE · GRADE 3
The Secret Runes of Rivendell
Solve the math equations by matching the elven symbols to their correct numbers to find the four-digit combination.
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.++=
- 2.3−=CODE 1
- 3.×=
- 4.×+=CODE 2
- 5.×−=
- 6.×+=CODE 3
- 7.++=
- 8.5−=CODE 4
- 9.2+=
- 10.5−=
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 bilbo bagginss locked.
Show answer key (for grown-ups)
Key: pentagon = 3 · hexagon = 9 (hidden) · ring = 11 · lightning bolt = 6 · circle = 2 · heart = 7 (hidden)
Every symbol is a whole number from 1 to 12.
Vault code: 0902