A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

Can you count the number of squares in the figure below?

I am white when I am dirty, and black when I am clean. What am I?

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

O_er_t_o_

Complete the missing letters of the given word.

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Can you find the thief by just looking at the picture below?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.