[求助]GWD-1-14 涛涛

baobaobears

 

Q14:

If 10⁵⁰ – 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

wall_streets

以10为底数

susenmay

10^50=10000000....00000(50个0)

10^50-74=9999999...99926(50-2个9)

所以sum=48*9+2+6=440