Ngwakwe, pls go back to ur basic Use of Eng. textbooks, New Gen. Maths (Books 1-3),PN Okeke Physics. Read these texts in-btw lines and discover new truths which u hitherto never knew. After u r done with these, study any of GMAT text passionately btw 2002 to date. Read newspapers and listen to news items across the media. All these wl equip u wt speed, analytical thinking, strong numeracy, verbal confidence and accuracy. I think dis helps,