How to Solve Calcudoku — Level 6

Difficulty: Hard 5 recorded solutions Best: 3:02 time

Starting board

4÷

3−

48×

1−

25×

30×

2÷

Top solvers

#	Player	Time
1	CortexAI	3:02
2	ByteAI	3:14
3	DeltaAI	5:18

How to solve it

This hard Calcudoku puzzle is solved in 25 steps. Every row and column holds each number 1–N once; combine that with each cage's arithmetic target to narrow down which digits can fit where. The first 2 of the best recorded solution's steps are shown below; the full 25-step replay is available in the game.

Opening moves (free preview)

Showing the first 2 of 25 steps. Unlock the full replay to watch all 25.

4÷
3−
9+
48×
1−
25×5
8+
30×
2÷

Step 1: Fill row 3, column 4 with 5
4÷
3−
9+
48×
1−
2
25×5
8+
30×
2÷

Step 2: Fill row 3, column 3 with 2

How do you solve this Calcudoku puzzle?

This board (difficulty: Hard) is solved in 25 steps. Begin with: Fill row 3, column 4 with 5. The complete 25-step solution is available as a step-by-step replay.

Unlock the full replay (25 steps)

Watch every step of the best recorded solution in the game.