194645

This is how I worked out this 3x3 mathdoku;
Firstly, I filled in the numbers that are already given to me, 1 and 2. Since they are in the same column, I can deduce that the bottom left corner box would be 3.
Now that I know that is 3, I have to minus 1, which is 2. So, the only number left would be 1.
Next, I have to find the value of x if x-1=1. This would leave the answer of 2. That means the only number left is 3.
Now I have 2 blank spaces, one in the middle and one in the top row, middle. I can deduce that the middle one is 3 as it is the only number left for that row and 1 for the top one, following the same procedure.
Now I know that the top row is 2,1 and 3. The middle row is 1,3 and 2. The bottom row is 3,2 and 1.