If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

John was piloting a plane behind a car but was never able to overtake it. Why?

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 natural numbers have a sum of less than 100 and are greater than one.

John knows the product of the numbers and Jacob knows the sum of numbers.

The following conversation takes place between them:
John: 'I am not aware of those numbers.'
Jacob: 'I knew you wouldn't be. I am not aware myself.'
John: 'Now I know them!'
Jacob: 'Now I know them, too!'

What are the two numbers?

I have Rs.50 and I spend it in the way as below.

Can you solve below mathematical equation?

2^1234 - 2^1233

What is common among 11, 69, and 88?

It is always ahead of me yet I can never see it. What is it?

What does this mean?

CCCCCCC

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?