最后那个几何题是120度不？小学数学确实考得难！

新加坡小学数学题如此之难，难怪现在小学生象棋砍我很轻松。新加坡小学数学题如此之难，难怪现在小学生象棋砍我很轻松，中学生可以砍甲级。 政府从小就培养了小学生超凡的数理逻辑能力，使得他们能在复杂的局面下看的一清二楚。 我在网上找了一下今年小学毕业考试PSLE数学的题目，大家有兴趣的话看看吧。 小学应该是不可以设X的。 这个是著名的被头条登出的Jim和Ken的问题。 Jim bought some chocolates and gave half of it to Ken. Ken bought some sweets and gave half of it to Jim. Jim ate 12 sweets and Ken ate 18 chocolates. The ratio of Jim's sweets to chocolates became 1:7 and the ratio of Ken's sweets to chocolates became 1:4. How many sweets did Ken buy?. Ans: 下面这个自行车的问题也难， Mei and Lin were in a bicycle race. Mei was travelling at a constant speed of 20km/hr and they both did not change their speed. When Lin completed half the race, Mei was 3.5km ahead. Mei completed the race at 10.45am. What time did Lin complete the race? Ans: 下面几道题还算可以，但整个paper整体难度的确很高。 Sally baked some cookies to sell. 3/ (more...)

GFE and HFE 为等腰三角形（由于FG=FE=FH）GEF=(180-30)/2=75deg，怎么来的？？应该有个规的。应该画个圆圈吧。