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CRACK THE CODE · GRADE 2

Roblox Block Code Quest

Find the number value of each Roblox game icon to solve the final math equations and unlock the secret builder chest.

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.

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The key

=8
=7
=9
=4
=1

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. 1.2=
  2. 2.+=CODE 1
  3. 3.3=
  4. 4.2−=CODE 2
  5. 5.2−=
  6. 6.+=CODE 3
  7. 7.+−=
  8. 8.++=CODE 4
  9. 9.?+=13Which shape?
  10. 10.+?=11Which 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 secret builder chest.

Show answer key (for grown-ups)

Key: cross = 8 · diamond = 7 · ring = 9 · circle = 4 · square = 1

Every symbol is a whole number from 1 to 10.

1.2 x ring18
2.circle + cross12
3.3 x square3
4.2 x diamond - circle10
5.2 x diamond - cross6
6.circle + diamond11
7.cross + diamond - circle11
8.circle + square + diamond12
9.? + circle = 13ring
10.diamond + ? = 11circle

Vault code: 2012

About Crack the Code

Crack the Code is early algebra without the letters: a key maps shapes to numbers, and the kid substitutes, computes, and — from grade 3 up — deduces hidden values from shape equations before they can solve anything. Grade 2 practices addition, subtraction, and multiplying by 2 and 3. Every sheet has exactly one right key and one right code.

It's one of three things Math Mysteries makes, free and printable, personalized to what your kid is into: a full math mystery whodunit, a Lab Work sheet of multi-step word problems, or a Crack the Code sheet like this one. Browse free printable worksheets by grade, skill, and theme.

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