CRACK THE CODE · GRADE 3
The Canine Cupboard Code
Solve the paw-print equations to figure out the number behind each dog toy and unlock the automatic treat dispenser.
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 12. 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
- 3.2+=
- 4.3−=CODE 2
- 5.×+=
- 6.5−=CODE 3
- 7.×+=
- 8.×=CODE 4
- 9.5−=
- 10.2+=
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 bark-o-matic treat dispenser.
Show answer key (for grown-ups)
Key: ring = 8 (hidden) · pentagon = 9 · cross = 6 · star = 12 · circle = 3 (hidden) · heart = 7
Every symbol is a whole number from 1 to 12.
Vault code: 6633