Eight of us go fourth, not back, to protect our king from an attack. What are we?

Our product and our sum always give the same answer. Who are we?

One night, a woman receives a call from the police. They tell her that her husband was murdered and that she should come to the crime scene as soon as possible. The woman drops the phone, shocked, and drives 20 minutes to the crime scene. As soon as she reaches the crime scene, the police arrest her and she is convicted of murder. How do the police know she committed the crime?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

How many times can you subtract the number 5 from 25?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.