what does the below rebus means?

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?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

Can you solve the photo plexer logic ?

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

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

Can you solve the below rebus?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?