求NN解答！

tmacvsme · 发表于 2011-4-30 14:20:28

If 1050 – 74 is written as an integer in base 10 notation, what is the sum of the digits in that integer? 请问这题翻译过来是什么意思啊答案是4

tmacvsme · 发表于 2011-4-30 14:20:45

是10^50

红红的云 · 发表于 2011-5-2 12:26:24

If 10^50 - 74 is written as an integer in base 10 notation, what is the sum of the digits in that integer?
A. 424
B. 433
C. 440
D. 449
E. 467

10^3 = 1000 [4 digits]
10^5 = 100000 [6 digits]

similarly,
10^50 = 1000....[51 digits]

1000 - 74 = 926
100000 - 74 = 99926

10^50 - 74 = 99999999......26

Therefore the sum of the digits = 9*48 = 432 + 2 + 6 = 440.

Hope this helps.

tmacvsme · 发表于 2011-5-2 19:46:06

thanks!~

enyika2014 · 发表于 2014-10-17 23:57:50

thanks, help me a lot

求NN解答！

所属分类: GMAT考试

正在浏览此版块的会员 ()

浏览过的版块