Find the value of "?" in the ball picture Riddle below:

There are three Athletes (John, Tarun and Harish) and their individual Coaches (Jacob, Meenaxi and Priyanka) standing on the shore.
No Coach trusts their Athlete to be near any other Coach unless they are also with them.
There is a boat that can hold a maximum of two persons.
How can the six people get across the river?

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

( ) + ( ) + ( ) = 30

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

what does this below rebus represent identXQQQQQME

Can you place three balls such that the equation shown in the picture holds true?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

What is both possible and impossible at the same time?

What Deficiency does the below rebus represent?

VIT_MIN

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?