CRACK THE CODE · GRADE 4
The Pumpkin Witch's Spellbook Lock
Use your math skills to figure out the value of each Halloween symbol and unlock the witch's secret potion chest.
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 15. 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.×=CODE 1
- 3.100+=
- 4.100+=CODE 2
- 5.10−=
- 6.×−=CODE 3
- 7.(+)×=
- 8.×=CODE 4
- 9.(−)×=
- 10.10−=
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 secret potion chest.
Show answer key (for grown-ups)
Key: heart = 13 (hidden) · pentagon = 4 (hidden) · moon = 14 · lightning bolt = 11 · cross = 9 (hidden) · ring = 8
Every symbol is a whole number from 1 to 15.
Vault code: 3488