Volcano- Mystery Addition - Coloring Squared - Free Printable

Let’s solve this step by step.

We are given a grid of numbers and a key that tells us which color to use for each number range:

- 0 → Yellow
- 1–5 → Blue
- 6–10 → Red
- 11–15 → Brown
- 16–20 → Black

Our job is to go through every number in the grid, figure out which range it falls into, and then imagine coloring that square with the correct color. But since we’re not actually coloring, we’ll just verify what colors should be used — and if needed, count how many of each color there are (though the problem doesn’t ask for counts, just to “solve” the puzzle, which likely means understanding how to apply the key).

But wait — looking again at the task: it says “Mystery Puzzle #4 Advanced Addition”. That suggests that maybe the numbers in the grid are *answers* to addition problems? Let me check the top row:

First row: 9, 18, 3, 17, 2, 15, 10, 13, 14, 16, 19, 1, 11, 12, 20, 8, 7, 6, 5, 4

These look like random numbers from 1 to 20 — but perhaps they are sums of two single-digit numbers? For example, 9 could be 4+5, 18 could be 9+9, etc. But the worksheet doesn’t show any addition problems — just the grid of numbers and the key.

Actually, re-reading the instructions implied by the title “Advanced Addition” and “Mystery Puzzle”, I think the student is supposed to:

1. Look at each number in the grid.
2. Use the key to assign a color based on the number’s value.
3. Color the grid accordingly — and when done, a mystery picture might appear (like a pixel art image).

Since we can’t color here, and the user hasn’t asked for a specific output like “how many red squares?”, the most helpful thing is to explain how to do the puzzle correctly — so the student can complete it themselves.

But let’s double-check: Is there any hidden math? Are these numbers results of additions we need to compute? Looking at the grid, all numbers are between 1 and 20, and the key covers 0 to 20. The first cell is 9 — which is within 6–10 → Red. Second is 18 → 16–20 → Black. Third is 3 → 1–5 → Blue. And so on.

So no actual addition needs to be performed — the numbers are already given. The “Advanced Addition” title might refer to the fact that students previously practiced adding to get these numbers, or that the puzzle is meant for students who have mastered basic addition.

Therefore, solving the puzzle means applying the color key to each number in the grid.

To make sure I’m not missing anything, let’s test a few cells:

- Row 1, Column 1: 9 → 6–10 → Red ✔
- Row 1, Column 2: 18 → 16–20 → Black ✔
- Row 1, Column 3: 3 → 1–5 → Blue ✔
- Row 1, Column 4: 17 → 16–20 → Black ✔
- Row 1, Column 5: 2 → 1–5 → Blue ✔
- Row 1, Column 6: 15 → 11–15 → Brown ✔
- Row 1, Column 7: 10 → 6–10 → Red ✔
- Row 1, Column 8: 13 → 11–15 → Brown ✔
- Row 1, Column 9: 14 → 11–15 → Brown ✔
- Row 1, Column 10: 16 → 16–20 → Black ✔
- Row 1, Column 11: 19 → 16–20 → Black ✔
- Row 1, Column 12: 1 → 1–5 → Blue ✔
- Row 1, Column 13: 11 → 11–15 → Brown ✔
- Row 1, Column 14: 12 → 11–15 → Brown ✔
- Row 1, Column 15: 20 → 16–20 → Black ✔
- Row 1, Column 16: 8 → 6–10 → Red ✔
- Row 1, Column 17: 7 → 6–10 → Red ✔
- Row 1, Column 18: 6 → 6–10 → Red ✔
- Row 1, Column 19: 5 → 1–5 → Blue ✔
- Row 1, Column 20: 4 → 1–5 → Blue ✔

All match the key. So the method is confirmed.

Now, since the puzzle is called a “mystery puzzle”, after coloring all squares according to the key, a picture should emerge — probably something fun like a robot, animal, or symbol. But without being able to see the colored result, we can’t say what it is. However, the student’s task is simply to apply the key correctly.

So, to “solve” this homework problem, the student should:

- Go row by row, left to right.
- For each number, find which range it belongs to using the key.
- Color that square with the corresponding color.
- Continue until the whole grid is colored.
- Then, look at the big picture that appears!

There’s no calculation needed beyond matching numbers to ranges — it’s a classification/coloring activity based on number values.

Final Answer:
Apply the color key to each number in the grid:
- 0 = Yellow
- 1–5 = Blue
- 6–10 = Red
- 11–15 = Brown
- 16–20 = Black
Color each square accordingly to reveal the mystery picture.