If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

Take one out and scratch my head, I am now black but once was red. What am I?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

Why is the Hole below a Lock?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

How many Watermelons are there in the below picture?

A blonde put eyeliner on her head. Why?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?