Aalto700
Looking at the screenshots you added, I would suggest you to focus on the Easy and Medium ones you got incorrect - were they silly mistakes or there was some conceptual gap? If it is the former then you need to work on maintaining your focus and eye to detail throughout the test; in case of a conceptual gap, make a note of it, do a quick revision of the topic and re-solve the same question or similar questions - twice / thrice a week for 2 weeks.
Use filters on the DI forum, and select the the question types and sub-topics of the ones you made mistakes in, and try to get your accuracy to 100% for easy and medium questions.
For the score you're targeting - I won't worry much about the current accuracy you have on Hard questions.