[Aradalf]

This is interestingly very similar to the Computer Science specific questions on the Oxford Mathematics Admissions Test (MAT).

For examples, look at page 16 of the 2013 exam: https://www.maths.ox.ac.uk/system/files/attachments/test13.p...

and page 16 of the 2014 exam: https://www.maths.ox.ac.uk/system/files/attachments/test14.p...

[ballpoint]

I've taken those before and I thought this was harder.