I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

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

Why 1729 is a magic number? Answer Logically.

Count the number of squares in the picture below.

How can you write nineteen in a manner that if we take out one, it becomes twenty?

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?

John was writing his first book. After saving the document, he locked his laptop with a password and mentioned some phrases for the hint box.

A friend of his tried opening his laptop but found out that it was password protected. Following is the hint that appeared.
1 mobile 3 books 2 roars 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches.

Can you help him in cracking the password?

A father's child, a mother's child, yet no one's son.

Who am I?

Which English verb becomes past tense just by rearranging the letters?

Find the 8 in the below-given Image.