I’m tall when I’m young, and I’m short when I’m old. What am I?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

If a wheel has 54 spokes, how many spaces are there between the spokes?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

John was piloting a plane behind a car but was never able to overtake it. Why?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.