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

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

Which city is three-fifths chick two third cat and 50% goat?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

Vin Diesel is pulling a theft and has planned to run away with all the cash kept in the safe. But the only way to open the safe is the 13 character password. He has a set of five clues given to him by a trustworthy source.

Exactly two of the below statements are false.
The password is contained within this sentence.
The password is not in this hint.
The password is within only one of these statements.
At least one of the above statements is a lie.

Next Number in the Series,

5, 16, 49, 104, ?

You see me once in June, twice in November, and not at all in May. What am I?

When monkey rotate the gear, which mark will be hit 1 or 2 ?