Spot what is wrong here in below Picture?

Can you name four days which start with the letter 'T'?

What has many teeth, but cannot bite?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

Why Aeroplane windows are round?

You bought me for dinner but never eat me. What am I?

Whats the next number in the below number sequence pattern.

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?

Which number should replace the question mark?