How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

I make two people out of one. What am I?

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.

Take away the whole and some still remain. What is it?

Can you find the 09 errors in the picture below?

what does this picture(rebus) riddle means ?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

Which number should replace the question mark?