We are given this counter diagram:


And we must locate the mistakes and correct them, to make sure it's a synchronous mod-15 counter.
Now, from what I've tried it should look like this:


So when it reads 1110 (14), it resets the counter to 0000.
Is my answer correct?

 

Welcome to AAC!

So when it reads 1110 (14), it resets the counter to 0000.
Is my answer correct?

Your answer in incorrect.

Do you have this circuit in a simulator? If so, what does it show happening during the transition from 13 to 14?

 

Welcome to AAC!
Your answer in incorrect.

Do you have this circuit in a simulator? If so, what does it show happening during the transition from 13 to 14?

Thank you.

No I don't, it's supposed to be hand-drawn using Karnaugh etc. and I tried solving it as is.

 

I tried solving it as is

When the count reaches 13, what will happen on the next clock?

 

For starters, your proposed solution is not a synchronous counter because you are using the asynchronous resets as part of the normal operation. Note that even the original circuit did not use (or even have) the resets.