There are not enough questions. Unskilled skills. The understanding of knowledge points or topic cuts only floats on the surface and will lack flexibility. Be sure to lay a good foundation and remember the definition. Never change, so do more questions. There is no other shortcut to mathematics. Don't look at the answer easily, try to look at it again. The distance of 60-90 is self-confidence. The distance of 90- 120 is to give. The distance between 120- 135 is perseverance. The distance between 135- 145 is a skill. The distance between 145- 149 is talent. The distance between 149- 150 is luck.