How many sides does a circle have?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

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?

Can you write down eight eights so that they add up to one thousand?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Give it food and it will live; give it water and it will die.

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

What has to be broken before you can use it?

Can you find the missing piece of the Porsche?