[問題]考古題 DS Form14 sec4-Q7

[amyliang]

The budget for Country X doubled every 5 years from 1900 to 1950. If the budget was $1,000,000 in 1900, then, of the following years, in which did the budget exceed $100,000,000 by the least amount?
(A)1925
(B)1930
©1935
(D)1940
(E)1945
答案是C
老實說，我是用最笨的方式，就是拿$1,000,000直接倍數的算下去，但我想，應該有更聰明的方法吧！所以想要請教一下各位。謝謝。

Amy Liang

[micki]

$1,000,000 -> $100,000,000 => 100 倍

要大於100但是最接近100的狀況下, 2[sup]7[/sup] =128

1900+ 5*7=1935

[amyliang]

$1,000,000 -> $100,000,000 => 100 倍

要大於100但是最接近100的狀況下, 2[sup]7[/sup] =128

1900+ 5*7=1935

真的是太謝謝您了

我完全了解了
謝謝
Amyliang