Can you solve this picture maths equation?

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

Solve the following series:
AZ, GT, MN, __, YB

Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

Look at the picture and find out which square is not linked with any of the other squares.

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I