Can you decipher the two rows to find the hidden word?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

A father's child, a mother's child, yet no one's son.

Who am I?

What makes this number unique: 8,549,176,320?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

When we see 2 but call 10?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

John is selling fruits.
He sells grapes at $30, Dates $25, and a Wolfberry $45.
At what price does he sell fig?

PS: Logical Thinking