CRACK THE CODE · GRADE 2
Fossil Hunter Code Breaker
Use your addition and subtraction skills to find the number value of each dinosaur footprint and open the locked field laboratory 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
=7
=9
=6
=5
=4
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.++=CODE 2
- 5.2+2=
- 6.+−=CODE 3
- 7.−=
- 8.3=CODE 4
- 9.+?=11Which shape?
- 10.?+=16Which 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 steel paleontologist specimen.
Show answer key (for grown-ups)
Key: triangle = 7 · circle = 9 · star = 6 · ring = 5 · pentagon = 4
Every symbol is a whole number from 1 to 10.
1.2 x pentagon8
2.circle + ring14
3.2 x circle18
4.triangle + ring + circle21
5.2 x star + 2 x circle30
6.star + ring - triangle4
7.ring - pentagon1
8.3 x circle27
9.triangle + ? = 11pentagon
10.? + triangle = 16circle
Vault code: 4147