no offence but if you cant do add maths it's either you didn't try hard enough or you are not cut out for science mathematics related courses because trust me, add maths is not that difficult compared to the modules you will be taking in university. not trying to intimidate you, maybe you could do language or essay based courses like history or economics. (bear in mind that thee are heavy maths based modules in economics such as econometrics, you cant run away from maths!)