TWO RHYMING RIDDLES

1)

I come in a box with my brother,

We know not our father or mother;

Together we most useful are,

But useless when one is without the other.

2)

My head and tail both equal are,

My middle slender as can be;

Whether I stand on head or heel,

It matters not to me.

But if my head should be cut off,

The result is passing strange;

What's left of me

Is now to nothing changed.

Answers:

1. Shoes

2. The number 8