CRACK THE CODE · GRADE 1
Dinosaur Egg Hatchery Code
Use your subtraction and addition skills to find the missing numbers hidden behind the prehistoric footprints and bones.
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
=4
=3
=1
=2
Every symbol is a whole number from 1 to 9.
Crack these
- 1.+=
- 2.+9=CODE 1
- 3.+=
- 4.−=CODE 2
- 5.−=
- 6.12−=CODE 3
- 7.10−=
- 8.++=CODE 4
- 9.?+=5Which shape?
- 10.+?=7Which 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 heavy dinosaur egg.
Show answer key (for grown-ups)
Key: moon = 4 · triangle = 3 · diamond = 1 · square = 2
Every symbol is a whole number from 1 to 9.
1.triangle + square5
2.diamond + 910
3.triangle + diamond4
4.square - diamond1
5.moon - diamond3
6.12 - diamond11
7.10 - moon6
8.diamond + triangle + moon8
9.? + moon = 5diamond
10.triangle + ? = 7moon
Vault code: 0118