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

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

Can you solve below mathematical equation?

2^1234 - 2^1233

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

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

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

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Identify the 10 differences between the two given pictures.

Can you find out the missing number in the grid?