I would advice you to learn till C1 level. B1 is not enough and Bachelor in Math is mostly in German and you must take TestDAF, so I think you should spend one year or so clearing upto C1 and TestDAF, which is highly…
I would advice you to learn till C1 level. B1 is not enough and Bachelor in Math is mostly in German and you must take TestDAF, so I think you should spend one year or so clearing upto C1 and TestDAF, which is highly…