OK, great. The fact that you had such a quick answer means you’ve given this some thought already. I’m liking you more and more with each post.
The easiest fix I can give you in approaching a similar test is this:
First, do the problems you KNOW you’ll get right-- short ones first, longer ones afterwards.
Then go back and look at the problems you’ll have to slow down for. Think of tests as almost a scavenger hunt, except that you’re looking to accumulate points. So get the quick ones first, then go back for the ones that will cost you time.
How about this as an exercise-- retake that same test. Retype the questions, and sit down with a timer-- and try it my way. Do the questions you KNOW you could have aced first, and stop when the timer is up. See how your score compares.