Answer:
What measures out time. Until in time all is smashed to it?
A horrid monster hides from the day, with many legs and many eyes. With silver chains it catches prey. And eats it all before it dies. Yet in every cottage does it stay. And every castle beneath the sky.
A girl was ten on her last birthday, and will be twelve on her next birthday. How is this possible?
Until I am measured I am not known, Yet how you miss me when I have flown.
Long and slinky like a trout, never sings till it's guts come out.
I am the kind of an ant that's good at math. What am I?