The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

Prove that twice of ten is the same as twice of eleven.

What does this mean?

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Which word does the below Plexor means ?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?