why number 8549176320 is one of a kind?

How can you take 2 from 5 and leave 4?

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

What always comes into a house through the keyhole?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

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

'Ferrari driver' easily beats the 'force driver' in a two-car race. How did Indian newspapers truthfully report so to look as a 'force drive' had outdone the 'Ferrari driver'? Think!!!

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?