What does this below rebus puzzle mean?

Which is the correct shadow of the bird?

Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

Which letter of the alphabet has the most water?

How many times can you subtract the number two from the number fifty?

I don't get anymore wetter, no matter how much rain falls on me.

O_er_t_o_

Complete the missing letters of the given word.

What has a bottom at the top?