1 Getting Help with Math　在数学学习上寻求帮助

2 Visualizing Percentages　设想百分率

3 Are We There Yet?　我们到了吗？

4 The Tangram Puzzle　七巧板之谜

5 Calculators and Repeating Decimals　计算器与循环小数

6 Will Roman Numerals Return?　罗马数字会归来吗？

7 The Digits of Pi　π的位数

8 "Please Excuse My Dear Aunt Sally" “请原谅我亲爱的莎莉姑妈”

9 The Oldest Math Puzzle　早古老的数学谜题

10 Four out of Five Doctors Recommend...　五分之四的医生推荐

11 Not All Pyramids Are Square　不是所有的锥体都是四棱锥

12 Numbers with Personality　具有个性的数字

13 The"Right"Angle　“正确的”角（直角）

14 A Theorem Most Proved　被证明最多次的定理

15 Distances and Light Years　距离与光年

16 Sherlock Holmes Solves a Math Problem 夏洛克·福尔摩斯解出的一个数学题

17 The Fastest Answer 最快的解答

18 Proving Fermat's Last Theorem 证明费马最后定理

19 Working with Interest Rates 计算利息率

20 The Bridges of K？nigsberg 七桥问题

21 The Better Buy 更实惠地购物

22 Bits and Bytes 位与字节

23 Shapes That Cover 覆盖物的形状

24 Using Exchange Rates 使用汇率

25 Why Equations Don't Have Answers 为何等式没有答案

26 How Much Do You Save? 你节省了多少？

27 Beyond the Domino 从多米诺骨牌说开去

28 Prime and Composite Numbers 质数与复合数

29 Random Numbers 随机数

30 "Monday's Child Is Fair of Face" “周一出生的孩子拥有漂亮的脸蛋”

31 Making a Budget 做预算

32 The Quadragenarian in the Quadrangle 方院中四十多岁的人

33 Converting Measurements 度量单位换算

34 Storing a Million Dollars at Home 将一百万美金藏在家中

35 Patching Things Up with Your Bank 与你的银行达成和解

36 Playing Havoc with Generations 混乱的辈份

37 If This Is San Francisco,It Must Be Yesterday 如果这里是旧金山，那一定是在昨天

38 Working Through a Math Puzzle 解出一道数学谜题

39 Happy 22nd Birthday,Great-Great-Uncle Mike! 高曾舅舅迈克，二十二岁生日快乐！

40 Riding the Stock Market Roller Coaster 投资股票市场如坐过山车

41 The Binary Number System 二进制数字体系

42 Buying and Maintaining an Economy Car 购买和养护一辆经济型车

43 Adding 100 Numbers in Minutes 在数分钟内把一百个数字加起来

44 George Washington's Birthday 乔治·华盛顿的生日

45 Who Drinks Mineral Water? 谁喝矿泉水？

46 Getting out of Credit Card Debt 摆脱信用卡债务

47 Thinking in the Metric System 用公制思考

48 Winning Combinations 组合中的胜出几率

49 What a Coincidence! 真巧！

50 Avoiding Supermarket Booby Traps 避免超市的购物陷阱

51 Get Me to the Airport on Time 准时送我到机场

52 Brother,Can You Spare $100,000? 兄弟，你拿得出十万美金吗？

53 The Golden Rectangle 黄金矩形

54 Double or Nothing 双倍或没有

55 Can We Get Rid of Some Zeros? 可以去掉几个零吗？

56 Birthday Twins 同一天生日

57 Geometry on the Floor 地板上的几何学

58 Good for Nothing? 毫无价值？

59 Two Types of Spirals 两类螺旋形

60 Just Like Jack and the Beanstalk 就像杰克和仙豆的故事

61 The Toss of a Coin 抛硬币

62 Drawing on the Definition 根据定义作图

63 Zeno's Paradoxes 芝诺悖论

64 A Creative Leap 创造性的飞跃

65 What's Rational About That? 那有什么合理的？

66 Precision and Common Sense 精确与常识

67 What's It Worth to You? 对你而言其价值有多大？

68 A Visual Illusion 视觉假象

69 Equilateral and Equiangular 等边与等角

70 Looking Across for Answers 看对角，找答案

71 Only Length Times Width? 就是长度乘以宽度吗？

72 Making Patterns with Numbers 用数字构图

73 The Impossible Equation 不成立的等式

74 Just Rolling Along 向前滚动

75 Putting the Pieces Together 拼接

答案

检测表

进展表