choice 1.

sum of a digitt an it's reverse should be divisible by 11.

1211 is not div by 11.so it means that there is a zero at the end of the no...

and icant think of a no that has a zero and satisfies the baove number(1211)

closest i could think was 1120..

1120+211=1331..

insufficient.

choice 2.

//x// = x holds only if there is no zero at the end of that no...

since there can be diferent combinations of oter no..

so this choice is also insufficient..

together also not sufficient.

Choice E as per me.

can somebody show a more definite way of tackling such problems???

kevincan wrote:

For all positive integers n, /n/ is defined as the number that results when the digits of n are written in reverse order. For example, /27/=72 and /720/=27. What is the sum of the digits of x?

(1) x+/x/=1211

(2) //x//=x