Crack the Code

Play Crack the Code on Mobile devices.
Play on PC or Chromebook devices.

This puzzle is designed for whole class or small group instruction to get students talking about their mathematical thinking.
Solve for the missing pin code using the colored clue below. This activity it to generate the same learning experience of factoring a trinominal (a > 1) but using the color clues to simplify the process. Using this method we can introduce complex factoring practice to children at a younger age.

The example below corresponds to factoring 4x^2 + 21x + 5.

Note: I have tried to include most of the factoring a trinomial process, except for factoring out a common term.
I you wish to work on factoring with (a = 1) please check out Unidentified Flying Factors.