What a twisted question actually looks like
Your book asks the plain version. Your exam moves one small thing and suddenly nobody can solve it. Here is that gap, shown step by step.
Most students check a mock test like this: look at the score, feel something about it, move on. The score is the least useful thing that test produced.
There are only four reasons you lost a mark
Every wrong answer belongs to one of these four. Treating them all the same way is why mock scores stop improving.
- You did not know the concept. Fix: learn it again, then test yourself in two days.
- You knew it but could not apply it here. Fix: more mixed practice on the same idea, not more theory.
- A careless slip — wrong sign, misread units. Fix: a checking habit. Studying more will not help.
- You ran out of time. Fix: which questions to skip, not more content.
A student who studies harder because of careless mistakes is working hard on the wrong problem.
The twenty-minute habit
After every mock, write one letter next to each wrong answer: C for concept, A for application, S for slip, T for time. Then count them. The biggest group is your next two weeks.
Do this for four mocks in a row and a pattern shows up that no score ever shows: the exact, repeated way you lose marks. That pattern is the most valuable thing any test can give you.