I know how you feel, I panicked, on the diameter one, even though the math questions were not that hard. I expected algebra problems (factorisation, rearranging equations etc) which was not the case. Those 3D cubes though, hats off to those who can do them without scratching their head! Overall I was surprised at the tests, unfortunately I dont think I will be getting an invite to Dublin.
Best of luck to you and all others who took the tests.