Number1 tatc
Not meaning to sound rude but there are pages of info on what stage 1 tests are about and numerous examples have been given. Also it has been answered about calculators and the answer is no. It wouldn't be much of a test with them, how many atc stations have you seen with calculators next to them ?
Basically brush up on your mental maths and find as many cubes/diagram questions as you can from Internet etc...