Why Wine Glass Stem is so long?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

What time is it when an elephant sits on a fence?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

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

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.