SSC CHSL 12 Oct 2020 Shift 1 Paper

When in a number the difference between the sum of odd place and even place digits is divisible by 11,
then the number is also divisible by 11.
$963391\leftarrow$ Number
Sum of even place digits
$=6+3+1=10$
Sum of odd place digits
$=9+3+9=21$
Difference $=21-10=11$
11 is divisible by 11.
Hence, 963391 is also divisible by 11.