1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

A convention is held where all the big logicians are summoned. The master places a band on everyone's forehead. Now all of them can see others bands but can't see his own. Then they are told that there are different colours of bands. All the logicians sit in circle and they are further explained that a bell will ring at regular intervals. The moment when a logician knew the colour of band on his forehead, he will leave at the next bell. If anyone leaves at the wrong bell, he will be disqualified.

The master assures the logicians that the puzzle will not be impossible for anyone of them. How will the logicians manage ?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

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

If eleven plus two equals one, what does nine plus five equal?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?