Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

What goes up but never comes down?

Find the 8 in the below-given Image.

Solve the following series:
AZ, GT, MN, __, YB

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?

What's a single-digit number with no value?

What has a ring but no finger?

A man was gazing through the window of the 23rd floor of the building. He suddenly opened the window and jumped on the other side of the window. On landing on the floor, there was not a sheer mark of injury on him.

How can that be possible if he did not use any kind of parachute and did not land on a soft surface?