弱弱的问一道OG上的数学题

cecilia薇 · 发表于 2010-1-1 06:14:38

OG 11Edition 99.题
On a scale that measures the intensity of a certain phenomenon, a reading of n+1 corresponds to an intensity that is 10 times the intensity corresponding to a reading of n. On that scale, the intensity corresponding to a reading of 8 is how many times as great as the intensity corresponding to a reading of 3?

答案是 10^5

OG上的题解：Since each increase of 1 in the scale creates an intensity increase of a factor of 10, the intensity of a reading of 8 is 10^8/10^3=10^8-10^3=10^5 times an intensity reading of 3.

我不明白"times"不是“乘以”的意思吗？我问了一个在纽约银行做Vice president的banker朋友，他也完全解释不清楚。。。我数学比较弱。。。希望哪位好心人能帮忙翻译或者解释一下阿？？？

非常感谢！！

Happy new year to everybody!!!!

大荣 · 发表于 2010-1-1 19:05:29

牛VP都不用做这么简单的数学题了。

times是倍数的意思。SC题里面常有考倍数表达，比如“A three times as many as B”. 这里显然刻度是均匀的，n+1总是n的10倍，那么刻度8就是刻度3的10^5.如果要抽象成数学表达，刻度表就是一个等比数列，q=10.

cecilia薇 · 发表于 2010-1-2 10:48:03

谢谢～～学会了一个新词 “刻度”。。。。

弱弱的问一道OG上的数学题

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