I never managed to complete all the maths questions either but there's nothing we can do about it now.
To all those that are looking for pointers or hints regarding the tests, without wishing to offend, this is a competitive process with those with the best results progressing to the next stage. The people that have already completed the tests did so with no outside help and it would be foolish of them to offer an unfair advantage to those that are competing against them. Just get in there complete the tests as well as you can and hope that you're successful.
Good luck.