Always found those questions very hard. We did far to much maths prep. for Reading.
Can you post the question? Probably not as it is a road map.
Reading Maths exam over the last few years has not contained questions of that difficulty or if it did the boys have not reported it.
Have a look back at previous Reading format posts, the maths is not much beyond KS2.
The big test at Reading is three papers on one day, and the pain of not knowing if it is VR or NVR.
A couple of days ago I noticed on RBC website they have published the latest "Moving On Book" which says Reading has a small written exam, I think that is an error as both RBC admissions and Reading School say three papers all multi-choice. Somebody might want to seek clarification?