What occurs twice in a week, once in a year but never in a day?

Can it be possible to build a house that has all its four walls facing towards the South?

How can you leave a room with two legs and return with six legs?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

Women do it once a year after they turn 19 but men get to do it only once in a lifetime. What is it?

Detective Rockford was jogging near the beach at 4:30 am.
He hears a sound near the shack "No Michael, Please Do not shoot me".
Next instance he heard the sound of gunfire. Rockford rushes to the shack where he finds women lying dead and a gun in close proximity of three "Doctore Lawyer and a Teacher".

Rockford immediately knew that the Lawyer has committed the crime. How?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

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.

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.