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

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

Find out the missing number in the picture attached:

Find the last number in the series below:

voN luJ yaM raM ---

John can eat 27 chocolates in an hour, Jacob can eat 2 chocolates in 10 minutes, and Jolly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a box of 120 chocolates whilst playing Chess?

I look at you, you look at me I raise my right, you raise your left. What am I?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

By using 'because' continuously three times, can you make an English statement ?

When can we add 2 to 11 and get 1 as the correct answer?

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?