How many three-digit numbers are divisible by $12?$

In the following AP, fill the missing term in the box:

$2, \square , 26$

In the following AP, fill the missing terms in the boxes:

$2,\square ,26,\square$

In the following AP, fill the missing terms in the boxes:

$\square ,13,\square ,3$

In the following AP, fill the missing terms in the boxes;

$-4,\square ,\square ,\square ,\square ,6$