What number should come in place of the question mark below?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

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?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

I have teeth but i don't bite. Who Am I ?

Guess the hidden movie name?

What Time Should the last watch show in the below figure?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

People make me, save me, change me, raise me. What am I?