Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

You need to arrange three 7 and mathematical symbols to form number 1?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Our product and our sum always give the same answer. Who are we?

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?

Find the next number in the series below

21 32 54 87 131 ?

If Japan and Panama decided to merge into a single country, probably people will name it Japanama.

Can you think of two more such country's unions that could produce similar names like Japanama by overlapping their three letters?

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?