Most of the Gibraltar paper asks for one answer. A significant number do not, and those are where marks quietly disappear.
The rule
When a question says mark two answers, or three, or four, you must get every one of them right to score. There is no partial credit. Two out of three is worth exactly the same as nothing.
That is harsher than it sounds, because a three answer question has more ways to be wrong than a one answer question has ways to be right.
Where they appear
They are spread across all four sections, but they cluster around a few kinds of question.
Lists of causes. What makes tyres wear unevenly, what causes a motorcycle to skid, what wastes fuel. These usually want three.
Safety procedures. What to do for someone in shock wants four answers. What to check before a journey in fog wants two.
Things that must work. Which parts must be in order for a vehicle to be roadworthy. The paper is asking about legal requirements, not about what is merely useful, and that distinction is the whole question.
How to approach them
Count before you commit. If it says three, make sure you have marked three. It sounds obvious, and it is still the single most common way people lose these marks.
Eliminate first. On a six option question wanting three, it is usually easier to rule out the three that are clearly wrong than to pick the three that are right.
Watch for the plausible extra. These questions often include one option that is true but not relevant. On the roadworthy question, plenty of things on the list are sensible to have working. Only some are legally required.
An example worth studying
One question asks which two things you should do if your tyre bursts while driving. The marked answers are to hold the steering wheel firmly to keep control and to pull up slowly at the side of the road.
Braking hard is on the list and it is wrong, because braking hard on a burst tyre is how you lose the car. Every option sounds like something a careful driver might do. Only two are what the paper marks.
Practise them deliberately
Because they are all or nothing, these questions repay practice more than any others. Here, a multi answer question shows how many you have picked as you go, and when you get it wrong it tells you how many of the required answers you did get, so you can see whether you nearly had it or were nowhere near.