What does this mathematical rebus means ?

What do you think with the below Picture ?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Can you solve the photo plexer logic ?

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Solve the counting riddle by identifying the number of triangles in the given picture.

John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not.

Is a married person looking at an unmarried person ?

Where do fish keep their money?