Crack the code

For the last couple days in maths we have been working on a crack the code ( photo down below )
We had to explain how we found the answer. After that we had to try and make our own code.We didn't get time to make our own so If we get around to it I will update this post and add my code and you should see if you can crack my code. I will add the video when we make it -next maths session

I found it easy to understand how to get the answer faster in more ways after we knew the answer.
I found it hard to find the code myself.
Here are some photos of the lock and my workings out, See if you can crack the code.