why number 8549176320 is one of a kind?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

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

I’m tall when I’m young, and I’m short when I’m old. What am I?

A man is found dead in his bathroom naked with blood scattered all around him. The bathroom was locked from the inside and there is no trace of any struggle. There is nothing in the bathroom except his pant with the belt still around and his shirt. Also, the medic team can't find any incision in his body that may have been the reason behind so much blood loss.

The Police department is clueless regarding this murder mystery.
Can you?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

What does does this rebus picture means ?

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?