GMAT数学教材[精彩].ppt

有关数学的运算;有关数学的运算;有关数学的运算;有关数学的运算;;;;;;有关数学的运算;有关数学的运算;有关集合;有关集合;;代数式 方程 不等式;代数式 方程 不等式;;;;分数;分数;小数;小数;基本数论;基本数论;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;w;t;;on the desk show above,a player spins the arrow twice.the fraction is formed, where a is the number of the sector where the arrow stops after the first spin and b is the number is the sector where the arrow stops after the second spin.on every spin,each of the numbered sectors has an equal probability of being the sector on which the arrow stops.what is the probability that the fraction is greater than 1? A. B. C. D. E.;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;A wheel has an outer diameter of 11 inchs,as shown above.the rim is 1 inch wide and the diameter of the hub is 2 inches.if each spoke extend ? inch into the hub and ? inch into the rim,what is the sum of the length of the 5 spokes,in inches?;;In a plane,two regions,S and T,are called “unlinked” if (1)S has no points in common with T. (2)any line segment that can be drawn with both endpoints in S has no points in common with any line segment that canbe draw with both endpoints in T. Which of the following shows a pair of regions that are unlinked?;;;;; Ellipse hyperbola parabola; Ellipse hyperbola parabola 椭圆 双曲线 抛物线;The figure above shows the graphs of y=x^2 and y=a-x^2 for some constant a.if the length of PQ is equal to 6,what is the value of a? A.6 B.9 C.12 D.15 E.18;;The figure above shows the graph of a quadratic function f that has a minimum at the point (1,1).if f(b)=f(3),which of the following could be the value of b? A.-3 B.-2 C.-1 D. 1 E.5;;;;;;;;;;In the schedule above,each session is to be1.5 hours long,each break is to be ? hour long,and lunch is to be 1 hour long.if session 4 is to end at 4:30 P.M,at what time should session 1 begin?A. 8:15 A.MB. 8:30 A.MC. 8:45 A.MD