If 1+9+8=1, what is 2+8+9?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

A non-stop marathon is the shared favourite sport of three brothers.

*The oldest one is fat and short and trudges slowly on.
*The middle brother's tall and slim and keeps a steady pace.
*The youngest runs just like the wind, speeding through the race.

"He is young in years, we let him run!" the other two brothers explained, "'because though he is surely number one, he is second, in a way." Why is it?

Can you Find and name the hidden bird in the picture below ?

Before Mount Everest was discovered, what was the highest mountain in the world?

I got a bee but no honey.
got an eye but am still blind.
got a sea but no water.
got a tea but no coffee.
got a why but no answer.

What Am I?

How can one talk without saying a single word?

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

I travel all around the world but always stay in the corner. What am I?