CRACK THE CODE · GRADE 5
The Scrap Metal Salvage Code
Assign the correct numerical value to each robotic part to calculate 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 20. 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+2=CODE 1
- 3.(+)×=
- 4.×−=CODE 2
- 5.10−=
- 6.×+×=CODE 3
- 7.+×=
- 8.×+×=CODE 4
- 9.3+2=
- 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 heavy steel storage.
Show answer key (for grown-ups)
Key: diamond = 14 · heart = 8 · ring = 15 · lightning bolt = 13 (hidden) · triangle = 7 (hidden) · square = 9 (hidden)
Every symbol is a whole number from 1 to 20.
Vault code: 9790