Which is the rope you never skip with?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

What has a bottom at the top?

I have an eye but still cannot see.

Who am I?

It is always ahead of me yet I can never see it. What is it?

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 name any English verb that becomes its past tense by simply rearranging the alphabets ?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

Replace the question mark with the correct number below.