5 too. This doesn't measure intelligence. Actually more intelligent people might actually score lower on this type of thing than the average. Most of these are word tricks or "mind" tricks. You think the sentence means on thing but they really mean another interpretation. I mean thins like:
Q: If there are 3 apples and you take away 2, how many do you have?
A. 2, you took them, remember?
Sure I guess you can look at it that way but if you interpret each question differently, like the next question is something similar but in that case they really are looking for the answer (1), then you have to just be lucky to get things right.