What has many keys but can’t open a single lock?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

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

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

What month of the year has 28 days?

Can you find the missing piece of the Porsche?

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 go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?