Can you calculate the probability of getting a sum of six when a dice is thrown twice?

There are seven sisters in a house in a village where there is no electricity or any gadget.

Sister-1: Reading Novel
Sister-2: Cooking
Sister-3: Playing Chess
Sister-4: Playing Sudoku
Sister-5: Washing clothes
Sister-6: Gardening

what is Sister-7 doing ?

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?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

What goes up but never comes down?

How many times in a given day, minutes and hour clock comes in a straight line ?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.