Duplicate of Brain Teasers

Look at me one way & I weigh a whole lot; turn me around & you’llsee that I am not. What am I? 

Before Mount Everest was discovered, what was the tallest mountain inthe world? 

What turns everything around without moving? 

Anyone can hold me, even without their hands, yet no one can do it forlong. What am I? 

If you have me, you want to share me. If you share me, I no longer exist. What am I?

What type of building has the most stories? 

If there are 100000000 bricks on a plane, and one falls off, how many are left?

I'm not alive,yet I grow;I have no lungs,yet I need air;Ihave nomouth,yet Ican drown.What am I

What goes up but never comes down?   

 Adriana's mom had four kids: Marta, Anna, Justina...