CRACK THE CODE · GRADE 5
The Deep Space Cipher
Calculate the numerical value of each orbital shape to crack the four-digit sequence.
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.+×=
- 2.10−=CODE 1
- 3.÷2+=
- 4.×−=CODE 2
- 5.10−=
- 6.×−=CODE 3
- 7.(+)×=
- 8.××=CODE 4
- 9.×+×=
- 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 secure cargo bay.
Show answer key (for grown-ups)
Key: hexagon = 5 (hidden) · moon = 15 · circle = 14 · square = 20 (hidden) · diamond = 16 · star = 12 (hidden)
Every symbol is a whole number from 1 to 20.
Vault code: 8840