You can see three almost identical images below. Can you spot the odd one out from them?

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?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

How many Watermelons are there in the below picture?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Which is the smallest number that you can write using all the vowels exactly once?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one?

5 $ 4 $ 3 $ 9 = 4215
6 $ 9 $ 2 $ 6 = 3816
4 $ 7 $ 3 $ 3 = 1122
7 $ 2 $ 7 $ 4 = ____

I have an eye but still cannot see.

Who am I?