UBA ( http://www.ubacareers.com )
Just read your GMat. Then also have an idea bout current affairs, e.g. Who's d senate president, when was nations/africans cup played and in which country, Who's Bank PhB's MD(sounds strange for UBA, right?)
The test is simple: Maths, English and Current Affairs. Maths is 15 questions, English is 15 questions, Current Affairs is 20 questions.