Question

Q. For what value of n, the sum of digits in the number $({10}^n+1)is2$?

• A. For n = 0 only
• B. For any whole number n
• C. For any positive integer n only
• D. For any real number n

Answer 1

The correct option is B For any whole number n

Except in ${10}^{0}1=1$, in ${10}^n$, the number of zeroes will be $‘n^{\prime }$ but only non-zero digit is digit $‘1^{\prime }$. Hence, for any whole number $n$, the sum of the digits in $({10}^n+1)=1+1=2$.