I have a clock in my house, on the wall.
On a summer's day I forgot to wind it and it stopped. Then I went to visit a friend who had a watch that was always right on time. After I stayed for a bit, I went home, made a simple alteration and set the clock just right.
Now how did I do this when I had no watch on me to tell how long it took me to come back from my friend's place?
Before I left, I wound the wall clock. Upon my return, the amount of change that I could see in the clock is how long it took to go to my friends place and come back, adding to that the time I spent there, which I know because the clock at my friend's place is accurate.
Subtracting the time of the visit from the time I was absent from my house, and dividing by 2, I obtained the time it took me to return home. I added this time to what my friend watch showed when I left, and set the sum on my wall clock.
I know what my job is, The point has been made. You say I have a big head, And you're right, I'm afraid. Put me in my place, And then leave me alone. What I need most, Is someone to drive me home. What am I?
Every dawn begins with me
At dusk I’ll be the first you see
And daybreak couldn’t come without
What midday centers all about
Daises grow from me, I’m told
And when I come, I end all cold
But in the sun I won’t be found
Yet still, each day I’ll be around.
My first letter is in follow but not in lead, and the second is in write but not in read.
My third letter is in sky but not in cloud, my fourth is in humble but not in proud.
My all makes circles in a bowl, or lies on a plate cooked up whole.
What am I?