CRACK THE CODE · GRADE 2
Dino Dig Site Cipher
Find the hidden number for each dinosaur footprint to reveal the combination that opens the locked fossil crate.
Each shape stands for a number. 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
=2
=10
=8
=6
=3
Every symbol is a whole number from 1 to 10. A number in front of a shape means multiply: 2 stars = 2 x star.
Crack these
- 1.+2=
- 2.−=CODE 1
- 3.2=
- 4.2+=CODE 2
- 5.2+=
- 6.3=CODE 3
- 7.2−=
- 8.2−=CODE 4
- 9.?+=9Which shape?
- 10.?+=5Which shape?
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 locked fossil crate.
Show answer key (for grown-ups)
Key: diamond = 2 · triangle = 10 · moon = 8 · square = 6 · ring = 3
Every symbol is a whole number from 1 to 10.
1.diamond + 2 x ring8
2.moon - square2
3.2 x square12
4.2 x square + moon20
5.2 x square + diamond14
6.3 x triangle30
7.2 x diamond - ring1
8.2 x square - triangle2
9.? + square = 9ring
10.? + ring = 5diamond
Vault code: 2002