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?

You need to remove two matchsticks to make the below equation true. Can you do it ?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

Can you count the number of blocks in the picture below?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

What's the only room from which no one can enter or leave

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

During which month do people sleep the least?

I am a word of 12 alphabets.

* Alphabets 12, 4, 7, 2, 5 : Eastern beast of burden
* Alphabets 1, 8, 10, 9 are street made famous by Sinclair Lewis.
* Alphabets 11, 3, 6 are past.

On whole it means a person suffering from delusions of greatness.

What Is it ?

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?