Divisibility Rule of 11

Q. If 5B12 is divisible by 11, then find the value of B.

1. 5

2. 4

3. 6

4. 11

Q.

Fill in the missing digit such that it is divisible by the given divisior. Is there more than one possible answer? If so list them
$\_27413÷11$

Q.

The number divisible by $11$ is:

1. $11,11,111$

2. $22,222$

3. $3,33,33,333$

4. $44,44,444$