Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

What does it mean?

No matter how little or how much you use me, you change me every month. What am I?

I am quite hot but become too cold if you remove the first two letters. What am I?

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

Why did Navjot Singh Sidhu put the new January calendar in the freezer

What demands an answer, but asks no questions

A river should be crossed by a father, a mother and their two sons and two daughters.
There are some rules that should be followed while crossing the river. There can be only two people in the raft while crossing. The daughters cannot be with their father unless there is the presence of the mother. The sons cannot be with their mothers unless the father is present. Unless the guard is on the board, the criminals cannot be with any of the family members. Only the adults like the father, the guard, and the mother knows to use the raft.

How will they cross the river?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

There were five men at church, and it started raining while they were outside. The four that ran still got wet, but the one that was still stayed completely dry. Why did he stay dry?