Can you find out which number multiplied by itself will give the output as 12345678987654321?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

What is so fragile that saying its name breaks it?

If you say my name, I will no longer exist. What am I?

It belongs to you, but other people use it more than you do. What is it?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

People put me on the table and cut me but do not eat me. What am I?

What came first, the chicken or the egg?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?