What question can you never answer yes to?

What does this say?

XLR8

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

Using eight eights and addition only, can you make 1000?

What does this rebus mean?

O
N
C
E
TIME

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?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

By what process could you make a 'Tea-Table' into food?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?