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标题: gwd 10 14 [打印本页]

作者: guafafd    时间: 2004-9-29 12:54     标题: gwd 10 14

Q14:

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

这道题不会做,答案是C.440 as an integer in base 10 notation什么意思?

请指教

我算出来是431,答案中根本没有:(


作者: himba    时间: 2004-9-29 12:57

就是10进制的意思。

99...9926 => 9*48+2+6=440.有48个9.






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