Answer:
What has a big mouth, yet never speaks?
It doesn't live within a house, nor does it live without. Most will use it when they come in, and again when they go out.
This thing all things devours: Birds, beasts, trees, flowers; Gnaws iron, bites steel; Grinds hard stones to meal; Slays king, ruins town, And beats high mountains down.
Double my number, I'm less than a score. Half of my number is less than four. Add one to my double when bakers are near. Days of the week are still greater, I fear.
What get wet while drying
Why was the cook arrested?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?