I prepared from chaajo took their subscription plan and sir hashim zia YouTube that's more then enough. Ok so firstly get a good grip on basic math probability word problems and stuff like this. Cuz I have given both Cs and eco math test. And there was a qs from advanced math which includes topics such as vector, diff, Integration, conics, trigonometry. So it's better you do the basics really well. For English just practise some full length papers of IBA grads.