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

What does this rebus riddle means ?

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?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

What does does this rebus picture means ?

Next Number in the Series,

5, 16, 49, 104, ?