Two DC have sat the Kent test and they didn't have cubes (DC2 did it this year). We all found them quite hard in the beginning. If you do want to give them a go then cut out nets and let DC fold them and use an actual cube to practise. This helped us.
They have not ever come up _ my ds hated them _ but found on some obscure goggle search last year reference to KCC looking to a new contract for 11+ EXAMINATIONS - as in those who set them. May well be that old contract has been renewed
Strange. Four children I spoke to today (who all passed) said that nets of cubes did come up in this September exam - but they listed some other topics that did not e.g. algebra
if you imagine folding out a cube/3D so that it lies flat on teh table ( e.g an oxo box) then that would be the 'net' of teh shape. Net questions usually ask you to identify which will/won't fold back up into a cube