Required Mathematical Intelligence

Chapter 110 How old is Little Clever?

An uncle asked how old "Little Clever" was, and he said, "If you subtract twice my age three years ago from twice my age three years from now, it will be equal to my current age."

Think about it, kids, how old is "little witty" this year?

[答案：他三年后的年龄比三年前大3 3=6（岁），他三年后的年龄的2倍减去他三年前年龄的2倍，差是6×2=12（岁），这就等于“小机灵”现在的年龄。所以“小机灵”的年龄是：（3 3）×2=12（岁）。]
(End of this chapter)