Question

Addition of $99$ and its reverse gives
A) $197$
B) $198$
C) $199$
D) None of the above

Answer 1

 Hint: Reverse of $78$ is $87$. Use this concept to find the reverse of the given number. Then add the number which you have obtained and the original number.

Complete step-by-step answer:
In this problem, the given number is $99.$
We are asked to find the sum of $99$ and its reverse number.
First, write the reverse of $99:$
Observing the given number, we can say that, digit $9$ is at the hundred’s place and digit $9$ is at the unit’s place. Swap the position of the numbers to make a new number. The new number comes out to be $99$ too after swapping.
So, add $99$ and $99$.
Addition gives:
$\begin{array}{c}99 + 99\\ = 198\end{array}$

Hence, the answer is $198.$.

Note: In this given problem, we are asked to find the sum of $99$ and its reverse. To do this, we must first convert the number which is given to its reverse, by reversing or swapping the digits, to form a new number. Just like normal addition, add the two numbers.