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

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

What is the largest number you can write with just 3 digits?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

A person is found murdered in his Chamber. When the crime scene is investigated, the Investigator find out that there is a calendar on which the victim has written a few numbers with his blood. The numbers are 4, 11, 11 and 4.

There are four suspects in the murder, John, Jacob, Anna and Lee. Can you find out who is the murderer?

What is always in front of you but can’t be seen?

Can you replace the question mark with the correct number?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?