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

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

John has eleven friends. He has a bowl containing eleven apples. Now He wants to divide the eleven apples among his friends, in such a way that an apple should remain in his bowl.
How can He do it?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

What number do you get when you multiply all of the numbers on a telephone's number pad?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

Consider this: Arnold Schwarzenegger has a big one. Michael J. Fox has a small one. Prince doesn’t have one. The Pope has one but never uses it. Bill Clinton has one and uses it all the time. What is it?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?