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

Our product and our sum always give the same answer. Who are we?

What kind of band never plays music?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

What do the following words have in common?

Assess
Banana
Dresser
Grammar
Potato
Revive
Uneven
Voodoo

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

Which city is three-fifths chick two third cat and 50% goat?

By what process could you make a 'Tea-Table' into food?

A guard is positioned at the one side of the bridge saying ‘A’. His task is to shoot all those who try to leave from ‘A’ to the other side and say ‘B’. He also need to welcome the person who comes from another side ‘B’ to his side ‘A’. The guard comes out of his post every 1 hour and looks down the bridge for any people trying to leave. You are at side ‘A’ and wish to go to another side ‘B’. you also know that it would take 1:45 hr to cross the bridge. How will you cross the bridge?

Which is heavier: a ton of bricks or a ton of feathers?