When can we add 2 to 11 and get 1 as the correct answer?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

Riddle me this, Riddle me that,
What am I? I am made of wood, but you can't see me down?

Usually, a boxing match consists of twelve rounds. In a particular friendly match between two heavyweights, the match was finished in the ninth round itself as one of the boxers knocked out the other one.

But, in that fight, no man threw even a single punch.

How can this be possible?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

Only Highly Attentive Can Spot The Ladder In This Library In 7 Seconds! Can You?

A car meter reading shows 72927 miles a palindromic number.
what is the minimum number of miles you would need to travel to see another palindromic number on the car meter reading?

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

It begins where the time ends.
Its second is an expression of surprise.
Its third is a question.
Its fourth is urinate.
It ends with a drink.

Which country it is?