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If N= 1+ 11 + 111 +1111 +...+111111111, ...

If `N= 1+ 11 + 111 +1111 +...+111111111`, then what is the sum of the digit's of N?
यदि `N= 1+ 11 + 111 +1111 +...+111111111` हो, तो N केअंकों का योग क्या है?

A

45

B

18

C

36

D

5

Text Solution

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The correct Answer is:
A
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