Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Which part of London exists in France as well ?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

The Little ant seems to be always confused. Do you know why?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

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Can you write down eight eights so that they add up to one thousand?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

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