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

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

I have eight fingers and two thumbs but I do not live. What Am I?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Why do you find that most of the buildings are deprived of the 13th floor?

Rumel, A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note:

710 57735 34 5508 51 7718

Currently, there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

What word is represented by this rebus?