From the Cut-e website:
Basically, you don’t need anything except a computer with a browser and Internet access. Other aids are generally not required. However, for some of the tests it is useful to have a calculator or perhaps pen and paper at hand. Some of the exercises, for example, are made up of various steps, the results of which you might want to jot down so as to make it easier to find the solution in the end. If any kind of aid is required or could be helpful, you will be informed accordingly in the introduction to the test.
For those who already did the test: Is a calculator allowed ?
Thanks !